Merge remote-tracking branch 'theirs/main' into max/improved-oauth-callback

client/bin/start.js

@@ -0,0 +1,120 @@
+#!/usr/bin/env node
+
+import { resolve, dirname } from "path";
+import { spawnPromise } from "spawn-rx";
+import { fileURLToPath } from "url";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+function delay(ms) {
+  return new Promise((resolve) => setTimeout(resolve, ms, true));
+}
+
+async function main() {
+  // Parse command line arguments
+  const args = process.argv.slice(2);
+  const envVars = {};
+  const mcpServerArgs = [];
+  let command = null;
+  let parsingFlags = true;
+
+  for (let i = 0; i < args.length; i++) {
+    const arg = args[i];
+
+    if (parsingFlags && arg === "--") {
+      parsingFlags = false;
+      continue;
+    }
+
+    if (parsingFlags && arg === "-e" && i + 1 < args.length) {
+      const envVar = args[++i];
+      const equalsIndex = envVar.indexOf("=");
+
+      if (equalsIndex !== -1) {
+        const key = envVar.substring(0, equalsIndex);
+        const value = envVar.substring(equalsIndex + 1);
+        envVars[key] = value;
+      } else {
+        envVars[envVar] = "";
+      }
+    } else if (!command) {
+      command = arg;
+    } else {
+      mcpServerArgs.push(arg);
+    }
+  }
+
+  const inspectorServerPath = resolve(
+    __dirname,
+    "../..",
+    "server",
+    "build",
+    "index.js",
+  );
+
+  // Path to the client entry point
+  const inspectorClientPath = resolve(
+    __dirname,
+    "../..",
+    "client",
+    "bin",
+    "client.js",
+  );
+
+  const CLIENT_PORT = process.env.CLIENT_PORT ?? "6274";
+  const SERVER_PORT = process.env.SERVER_PORT ?? "6277";
+
+  console.log("Starting MCP inspector...");
+
+  const abort = new AbortController();
+
+  let cancelled = false;
+  process.on("SIGINT", () => {
+    cancelled = true;
+    abort.abort();
+  });
+  let server, serverOk;
+  try {
+    server = spawnPromise(
+      "node",
+      [
+        inspectorServerPath,
+        ...(command ? [`--env`, command] : []),
+        ...(mcpServerArgs ? [`--args=${mcpServerArgs.join(" ")}`] : []),
+      ],
+      {
+        env: {
+          ...process.env,
+          PORT: SERVER_PORT,
+          MCP_ENV_VARS: JSON.stringify(envVars),
+        },
+        signal: abort.signal,
+        echoOutput: true,
+      },
+    );
+
+    // Make sure server started before starting client
+    serverOk = await Promise.race([server, delay(2 * 1000)]);
+  } catch (error) {}
+
+  if (serverOk) {
+    try {
+      await spawnPromise("node", [inspectorClientPath], {
+        env: { ...process.env, PORT: CLIENT_PORT },
+        signal: abort.signal,
+        echoOutput: true,
+      });
+    } catch (e) {
+      if (!cancelled || process.env.DEBUG) throw e;
+    }
+  }
+
+  return 0;
+}
+
+main()
+  .then((_) => process.exit(0))
+  .catch((e) => {
+    console.error(e);
+    process.exit(1);
+  });

client/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@modelcontextprotocol/inspector-client",
-  "version": "0.8.2",
+  "version": "0.9.0",
   "description": "Client-side application for the Model Context Protocol inspector",
   "license": "MIT",
   "author": "Anthropic, PBC (https://anthropic.com)",
@@ -8,14 +8,14 @@
   "bugs": "https://github.com/modelcontextprotocol/inspector/issues",
   "type": "module",
   "bin": {
-    "mcp-inspector-client": "./bin/cli.js"
+    "mcp-inspector-client": "./bin/start.js"
   },
   "files": [
     "bin",
     "dist"
   ],
   "scripts": {
-    "dev": "vite",
+    "dev": "vite --port 6274",
     "build": "tsc -b && vite build",
     "lint": "eslint .",
     "preview": "vite preview --port 6274",
@@ -72,6 +72,6 @@
     "ts-jest": "^29.2.6",
     "typescript": "^5.5.3",
     "typescript-eslint": "^8.7.0",
-    "vite": "^5.4.8"
+    "vite": "^6.3.0"
   }
 }

client/src/App.tsx

@@ -51,10 +51,7 @@ import Sidebar from "./components/Sidebar";
 import ToolsTab from "./components/ToolsTab";
 import { DEFAULT_INSPECTOR_CONFIG } from "./lib/constants";
 import { InspectorConfig } from "./lib/configurationTypes";
-import {
-  getMCPProxyAddress,
-  getMCPServerRequestTimeout,
-} from "./utils/configUtils";
+import { getMCPProxyAddress } from "./utils/configUtils";
 
 const CONFIG_LOCAL_STORAGE_KEY = "inspectorConfig_v1";
 
@@ -100,10 +97,21 @@ const App = () => {
   const [config, setConfig] = useState<InspectorConfig>(() => {
     const savedConfig = localStorage.getItem(CONFIG_LOCAL_STORAGE_KEY);
     if (savedConfig) {
-      return {
+      // merge default config with saved config
+      const mergedConfig = {
         ...DEFAULT_INSPECTOR_CONFIG,
         ...JSON.parse(savedConfig),
       } as InspectorConfig;
+
+      // update description of keys to match the new description (in case of any updates to the default config description)
+      Object.entries(mergedConfig).forEach(([key, value]) => {
+        mergedConfig[key as keyof InspectorConfig] = {
+          ...value,
+          label: DEFAULT_INSPECTOR_CONFIG[key as keyof InspectorConfig].label,
+        };
+      });
+
+      return mergedConfig;
     }
     return DEFAULT_INSPECTOR_CONFIG;
   });
@@ -111,6 +119,10 @@ const App = () => {
     return localStorage.getItem("lastBearerToken") || "";
   });
 
+  const [headerName, setHeaderName] = useState<string>(() => {
+    return localStorage.getItem("lastHeaderName") || "";
+  });
+
   const [pendingSampleRequests, setPendingSampleRequests] = useState<
     Array<
       PendingRequest & {
@@ -150,7 +162,7 @@ const App = () => {
     serverCapabilities,
     mcpClient,
     requestHistory,
-    makeRequest: makeConnectionRequest,
+    makeRequest,
     sendNotification,
     handleCompletion,
     completionsSupported,
@@ -163,8 +175,8 @@ const App = () => {
     sseUrl,
     env,
     bearerToken,
-    proxyServerUrl: getMCPProxyAddress(config),
-    requestTimeout: getMCPServerRequestTimeout(config),
+    headerName,
+    config,
     onNotification: (notification) => {
       setNotifications((prev) => [...prev, notification as ServerNotification]);
     },
@@ -203,6 +215,10 @@ const App = () => {
     localStorage.setItem("lastBearerToken", bearerToken);
   }, [bearerToken]);
 
+  useEffect(() => {
+    localStorage.setItem("lastHeaderName", headerName);
+  }, [headerName]);
+
   useEffect(() => {
     localStorage.setItem(CONFIG_LOCAL_STORAGE_KEY, JSON.stringify(config));
   }, [config]);
@@ -265,13 +281,13 @@ const App = () => {
     setErrors((prev) => ({ ...prev, [tabKey]: null }));
   };
 
-  const makeRequest = async <T extends z.ZodType>(
+  const sendMCPRequest = async <T extends z.ZodType>(
     request: ClientRequest,
     schema: T,
     tabKey?: keyof typeof errors,
   ) => {
     try {
-      const response = await makeConnectionRequest(request, schema);
+      const response = await makeRequest(request, schema);
       if (tabKey !== undefined) {
         clearError(tabKey);
       }
@@ -289,7 +305,7 @@ const App = () => {
   };
 
   const listResources = async () => {
-    const response = await makeRequest(
+    const response = await sendMCPRequest(
       {
         method: "resources/list" as const,
         params: nextResourceCursor ? { cursor: nextResourceCursor } : {},
@@ -302,7 +318,7 @@ const App = () => {
   };
 
   const listResourceTemplates = async () => {
-    const response = await makeRequest(
+    const response = await sendMCPRequest(
       {
         method: "resources/templates/list" as const,
         params: nextResourceTemplateCursor
@@ -319,7 +335,7 @@ const App = () => {
   };
 
   const readResource = async (uri: string) => {
-    const response = await makeRequest(
+    const response = await sendMCPRequest(
       {
         method: "resources/read" as const,
         params: { uri },
@@ -332,7 +348,7 @@ const App = () => {
 
   const subscribeToResource = async (uri: string) => {
     if (!resourceSubscriptions.has(uri)) {
-      await makeRequest(
+      await sendMCPRequest(
         {
           method: "resources/subscribe" as const,
           params: { uri },
@@ -348,7 +364,7 @@ const App = () => {
 
   const unsubscribeFromResource = async (uri: string) => {
     if (resourceSubscriptions.has(uri)) {
-      await makeRequest(
+      await sendMCPRequest(
         {
           method: "resources/unsubscribe" as const,
           params: { uri },
@@ -363,7 +379,7 @@ const App = () => {
   };
 
   const listPrompts = async () => {
-    const response = await makeRequest(
+    const response = await sendMCPRequest(
       {
         method: "prompts/list" as const,
         params: nextPromptCursor ? { cursor: nextPromptCursor } : {},
@@ -376,7 +392,7 @@ const App = () => {
   };
 
   const getPrompt = async (name: string, args: Record<string, string> = {}) => {
-    const response = await makeRequest(
+    const response = await sendMCPRequest(
       {
         method: "prompts/get" as const,
         params: { name, arguments: args },
@@ -388,7 +404,7 @@ const App = () => {
   };
 
   const listTools = async () => {
-    const response = await makeRequest(
+    const response = await sendMCPRequest(
       {
         method: "tools/list" as const,
         params: nextToolCursor ? { cursor: nextToolCursor } : {},
@@ -401,21 +417,34 @@ const App = () => {
   };
 
   const callTool = async (name: string, params: Record<string, unknown>) => {
-    const response = await makeRequest(
-      {
-        method: "tools/call" as const,
-        params: {
-          name,
-          arguments: params,
-          _meta: {
-            progressToken: progressTokenRef.current++,
+    try {
+      const response = await sendMCPRequest(
+        {
+          method: "tools/call" as const,
+          params: {
+            name,
+            arguments: params,
+            _meta: {
+              progressToken: progressTokenRef.current++,
+            },
           },
         },
-      },
-      CompatibilityCallToolResultSchema,
-      "tools",
-    );
-    setToolResult(response);
+        CompatibilityCallToolResultSchema,
+        "tools",
+      );
+      setToolResult(response);
+    } catch (e) {
+      const toolResult: CompatibilityCallToolResult = {
+        content: [
+          {
+            type: "text",
+            text: (e as Error).message ?? String(e),
+          },
+        ],
+        isError: true,
+      };
+      setToolResult(toolResult);
+    }
   };
 
   const handleRootsChange = async () => {
@@ -423,7 +452,7 @@ const App = () => {
   };
 
   const sendLogLevelRequest = async (level: LoggingLevel) => {
-    await makeRequest(
+    await sendMCPRequest(
       {
         method: "logging/setLevel" as const,
         params: { level },
@@ -433,6 +462,10 @@ const App = () => {
     setLogLevel(level);
   };
 
+  const clearStdErrNotifications = () => {
+    setStdErrNotifications([]);
+  };
+
   if (window.location.pathname === "/oauth/callback") {
     const OAuthCallback = React.lazy(
       () => import("./components/OAuthCallback"),
@@ -462,12 +495,15 @@ const App = () => {
         setConfig={setConfig}
         bearerToken={bearerToken}
         setBearerToken={setBearerToken}
+        headerName={headerName}
+        setHeaderName={setHeaderName}
         onConnect={connectMcpServer}
         onDisconnect={disconnectMcpServer}
         stdErrNotifications={stdErrNotifications}
         logLevel={logLevel}
         sendLogLevelRequest={sendLogLevelRequest}
         loggingSupported={!!serverCapabilities?.logging || false}
+        clearStdErrNotifications={clearStdErrNotifications}
       />
       <div className="flex-1 flex flex-col overflow-hidden">
         <div className="flex-1 overflow-auto">
@@ -623,9 +659,10 @@ const App = () => {
                         setTools([]);
                         setNextToolCursor(undefined);
                       }}
-                      callTool={(name, params) => {
+                      callTool={async (name, params) => {
                         clearError("tools");
-                        callTool(name, params);
+                        setToolResult(null);
+                        await callTool(name, params);
                       }}
                       selectedTool={selectedTool}
                       setSelectedTool={(tool) => {
@@ -640,7 +677,7 @@ const App = () => {
                     <ConsoleTab />
                     <PingTab
                       onPingClick={() => {
-                        void makeRequest(
+                        void sendMCPRequest(
                           {
                             method: "ping" as const,
                           },

client/src/components/DynamicJsonForm.tsx

@@ -1,35 +1,10 @@
 import { useState, useEffect, useCallback, useRef } from "react";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
-import { Label } from "@/components/ui/label";
 import JsonEditor from "./JsonEditor";
-import { updateValueAtPath, JsonObject } from "@/utils/jsonPathUtils";
-import { generateDefaultValue, formatFieldLabel } from "@/utils/schemaUtils";
-
-export type JsonValue =
-  | string
-  | number
-  | boolean
-  | null
-  | undefined
-  | JsonValue[]
-  | { [key: string]: JsonValue };
-
-export type JsonSchemaType = {
-  type:
-    | "string"
-    | "number"
-    | "integer"
-    | "boolean"
-    | "array"
-    | "object"
-    | "null";
-  description?: string;
-  required?: boolean;
-  default?: JsonValue;
-  properties?: Record<string, JsonSchemaType>;
-  items?: JsonSchemaType;
-};
+import { updateValueAtPath } from "@/utils/jsonUtils";
+import { generateDefaultValue } from "@/utils/schemaUtils";
+import type { JsonValue, JsonSchemaType } from "@/utils/jsonUtils";
 
 interface DynamicJsonFormProps {
   schema: JsonSchemaType;
@@ -38,13 +13,23 @@ interface DynamicJsonFormProps {
   maxDepth?: number;
 }
 
+const isSimpleObject = (schema: JsonSchemaType): boolean => {
+  const supportedTypes = ["string", "number", "integer", "boolean", "null"];
+  if (supportedTypes.includes(schema.type)) return true;
+  if (schema.type !== "object") return false;
+  return Object.values(schema.properties ?? {}).every((prop) =>
+    supportedTypes.includes(prop.type),
+  );
+};
+
 const DynamicJsonForm = ({
   schema,
   value,
   onChange,
   maxDepth = 3,
 }: DynamicJsonFormProps) => {
-  const [isJsonMode, setIsJsonMode] = useState(false);
+  const isOnlyJSON = !isSimpleObject(schema);
+  const [isJsonMode, setIsJsonMode] = useState(isOnlyJSON);
   const [jsonError, setJsonError] = useState<string>();
   // Store the raw JSON string to allow immediate feedback during typing
   // while deferring parsing until the user stops typing
@@ -231,111 +216,6 @@ const DynamicJsonForm = ({
             required={propSchema.required}
           />
         );
-      case "object": {
-        // Handle case where we have a value but no schema properties
-        const objectValue = (currentValue as JsonObject) || {};
-
-        // If we have schema properties, use them to render fields
-        if (propSchema.properties) {
-          return (
-            <div className="space-y-4 border rounded-md p-4">
-              {Object.entries(propSchema.properties).map(([key, prop]) => (
-                <div key={key} className="space-y-2">
-                  <Label>{formatFieldLabel(key)}</Label>
-                  {renderFormFields(
-                    prop,
-                    objectValue[key],
-                    [...path, key],
-                    depth + 1,
-                  )}
-                </div>
-              ))}
-            </div>
-          );
-        }
-        // If we have a value but no schema properties, render fields based on the value
-        else if (Object.keys(objectValue).length > 0) {
-          return (
-            <div className="space-y-4 border rounded-md p-4">
-              {Object.entries(objectValue).map(([key, value]) => (
-                <div key={key} className="space-y-2">
-                  <Label>{formatFieldLabel(key)}</Label>
-                  <Input
-                    type="text"
-                    value={String(value)}
-                    onChange={(e) =>
-                      handleFieldChange([...path, key], e.target.value)
-                    }
-                  />
-                </div>
-              ))}
-            </div>
-          );
-        }
-        // If we have neither schema properties nor value, return null
-        return null;
-      }
-      case "array": {
-        const arrayValue = Array.isArray(currentValue) ? currentValue : [];
-        if (!propSchema.items) return null;
-        return (
-          <div className="space-y-4">
-            {propSchema.description && (
-              <p className="text-sm text-gray-600">{propSchema.description}</p>
-            )}
-
-            {propSchema.items?.description && (
-              <p className="text-sm text-gray-500">
-                Items: {propSchema.items.description}
-              </p>
-            )}
-
-            <div className="space-y-2">
-              {arrayValue.map((item, index) => (
-                <div key={index} className="flex items-center gap-2">
-                  {renderFormFields(
-                    propSchema.items as JsonSchemaType,
-                    item,
-                    [...path, index.toString()],
-                    depth + 1,
-                  )}
-                  <Button
-                    variant="outline"
-                    size="sm"
-                    onClick={() => {
-                      const newArray = [...arrayValue];
-                      newArray.splice(index, 1);
-                      handleFieldChange(path, newArray);
-                    }}
-                  >
-                    Remove
-                  </Button>
-                </div>
-              ))}
-              <Button
-                variant="outline"
-                size="sm"
-                onClick={() => {
-                  const defaultValue = generateDefaultValue(
-                    propSchema.items as JsonSchemaType,
-                  );
-                  handleFieldChange(path, [
-                    ...arrayValue,
-                    defaultValue ?? null,
-                  ]);
-                }}
-                title={
-                  propSchema.items?.description
-                    ? `Add new ${propSchema.items.description}`
-                    : "Add new item"
-                }
-              >
-                Add Item
-              </Button>
-            </div>
-          </div>
-        );
-      }
       default:
         return null;
     }
@@ -374,9 +254,11 @@ const DynamicJsonForm = ({
             Format JSON
           </Button>
         )}
-        <Button variant="outline" size="sm" onClick={handleSwitchToFormMode}>
-          {isJsonMode ? "Switch to Form" : "Switch to JSON"}
-        </Button>
+        {!isOnlyJSON && (
+          <Button variant="outline" size="sm" onClick={handleSwitchToFormMode}>
+            {isJsonMode ? "Switch to Form" : "Switch to JSON"}
+          </Button>
+        )}
       </div>
 
       {isJsonMode ? (

client/src/components/JsonView.tsx

@@ -1,9 +1,10 @@
 import { useState, memo, useMemo, useCallback, useEffect } from "react";
-import { JsonValue } from "./DynamicJsonForm";
+import type { JsonValue } from "@/utils/jsonUtils";
 import clsx from "clsx";
 import { Copy, CheckCheck } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { useToast } from "@/hooks/use-toast";
+import { getDataType, tryParseJson } from "@/utils/jsonUtils";
 
 interface JsonViewProps {
   data: unknown;
@@ -11,21 +12,7 @@ interface JsonViewProps {
   initialExpandDepth?: number;
   className?: string;
   withCopyButton?: boolean;
-}
-
-function tryParseJson(str: string): { success: boolean; data: JsonValue } {
-  const trimmed = str.trim();
-  if (
-    !(trimmed.startsWith("{") && trimmed.endsWith("}")) &&
-    !(trimmed.startsWith("[") && trimmed.endsWith("]"))
-  ) {
-    return { success: false, data: str };
-  }
-  try {
-    return { success: true, data: JSON.parse(str) };
-  } catch {
-    return { success: false, data: str };
-  }
+  isError?: boolean;
 }
 
 const JsonView = memo(
@@ -35,6 +22,7 @@ const JsonView = memo(
     initialExpandDepth = 3,
     className,
     withCopyButton = true,
+    isError = false,
   }: JsonViewProps) => {
     const { toast } = useToast();
     const [copied, setCopied] = useState(false);
@@ -100,6 +88,7 @@ const JsonView = memo(
             name={name}
             depth={0}
             initialExpandDepth={initialExpandDepth}
+            isError={isError}
           />
         </div>
       </div>
@@ -114,28 +103,28 @@ interface JsonNodeProps {
   name?: string;
   depth: number;
   initialExpandDepth: number;
+  isError?: boolean;
 }
 
 const JsonNode = memo(
-  ({ data, name, depth = 0, initialExpandDepth }: JsonNodeProps) => {
+  ({
+    data,
+    name,
+    depth = 0,
+    initialExpandDepth,
+    isError = false,
+  }: JsonNodeProps) => {
     const [isExpanded, setIsExpanded] = useState(depth < initialExpandDepth);
-
-    const getDataType = (value: JsonValue): string => {
-      if (Array.isArray(value)) return "array";
-      if (value === null) return "null";
-      return typeof value;
-    };
-
-    const dataType = getDataType(data);
-
-    const typeStyleMap: Record<string, string> = {
+    const [typeStyleMap] = useState<Record<string, string>>({
       number: "text-blue-600",
       boolean: "text-amber-600",
       null: "text-purple-600",
       undefined: "text-gray-600",
-      string: "text-green-600 break-all whitespace-pre-wrap",
+      string: "text-green-600 group-hover:text-green-500",
+      error: "text-red-600 group-hover:text-red-500",
       default: "text-gray-700",
-    };
+    });
+    const dataType = getDataType(data);
 
     const renderCollapsible = (isArray: boolean) => {
       const items = isArray
@@ -236,7 +225,14 @@ const JsonNode = memo(
                 {name}:
               </span>
             )}
-            <pre className={typeStyleMap.string}>"{value}"</pre>
+            <pre
+              className={clsx(
+                isError ? typeStyleMap.error : typeStyleMap.string,
+                "break-all whitespace-pre-wrap",
+              )}
+            >
+              "{value}"
+            </pre>
           </div>
         );
       }
@@ -250,8 +246,8 @@ const JsonNode = memo(
           )}
           <pre
             className={clsx(
-              typeStyleMap.string,
-              "cursor-pointer group-hover:text-green-500",
+              isError ? typeStyleMap.error : typeStyleMap.string,
+              "cursor-pointer break-all whitespace-pre-wrap",
             )}
             onClick={() => setIsExpanded(!isExpanded)}
             title={isExpanded ? "Click to collapse" : "Click to expand"}

client/src/components/ListPane.tsx

@@ -22,7 +22,7 @@ const ListPane = <T extends object>({
   isButtonDisabled,
 }: ListPaneProps<T>) => (
   <div className="bg-card rounded-lg shadow">
-    <div className="p-4 border-b border-gray-200 dark:border-gray-700">
+    <div className="p-4 border-b border-gray-200 dark:border-gray-800">
       <h3 className="font-semibold dark:text-white">{title}</h3>
     </div>
     <div className="p-4">

client/src/components/OAuthCallback.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useRef } from "react";
-import { authProvider } from "../lib/auth";
+import { InspectorOAuthClientProvider } from "../lib/auth";
 import { SESSION_KEYS } from "../lib/constants";
 import { auth } from "@modelcontextprotocol/sdk/client/auth.js";
 import { useToast } from "@/hooks/use-toast.ts";
@@ -43,7 +43,10 @@ const OAuthCallback = ({ onConnect }: OAuthCallbackProps) => {
 
       let result;
       try {
-        result = await auth(authProvider, {
+        // Create an auth provider with the current server URL
+        const serverAuthProvider = new InspectorOAuthClientProvider(serverUrl);
+
+        result = await auth(serverAuthProvider, {
           serverUrl,
           authorizationCode: params.code,
         });

client/src/components/PingTab.tsx

@@ -3,14 +3,16 @@ import { Button } from "@/components/ui/button";
 
 const PingTab = ({ onPingClick }: { onPingClick: () => void }) => {
   return (
-    <TabsContent value="ping" className="grid grid-cols-2 gap-4">
-      <div className="col-span-2 flex justify-center items-center">
-        <Button
-          onClick={onPingClick}
-          className="font-bold py-6 px-12 rounded-full"
-        >
-          Ping Server
-        </Button>
+    <TabsContent value="ping">
+      <div className="grid grid-cols-2 gap-4">
+        <div className="col-span-2 flex justify-center items-center">
+          <Button
+            onClick={onPingClick}
+            className="font-bold py-6 px-12 rounded-full"
+          >
+            Ping Server
+          </Button>
+        </div>
       </div>
     </TabsContent>
   );

client/src/components/PromptsTab.tsx

@@ -43,7 +43,7 @@ const PromptsTab = ({
   clearPrompts: () => void;
   getPrompt: (name: string, args: Record<string, string>) => void;
   selectedPrompt: Prompt | null;
-  setSelectedPrompt: (prompt: Prompt) => void;
+  setSelectedPrompt: (prompt: Prompt | null) => void;
   handleCompletion: (
     ref: PromptReference | ResourceReference,
     argName: string,
@@ -84,84 +84,91 @@ const PromptsTab = ({
   };
 
   return (
-    <TabsContent value="prompts" className="grid grid-cols-2 gap-4">
-      <ListPane
-        items={prompts}
-        listItems={listPrompts}
-        clearItems={clearPrompts}
-        setSelectedItem={(prompt) => {
-          setSelectedPrompt(prompt);
-          setPromptArgs({});
-        }}
-        renderItem={(prompt) => (
-          <>
-            <span className="flex-1">{prompt.name}</span>
-            <span className="text-sm text-gray-500">{prompt.description}</span>
-          </>
-        )}
-        title="Prompts"
-        buttonText={nextCursor ? "List More Prompts" : "List Prompts"}
-        isButtonDisabled={!nextCursor && prompts.length > 0}
-      />
-
-      <div className="bg-card rounded-lg shadow">
-        <div className="p-4 border-b border-gray-200">
-          <h3 className="font-semibold">
-            {selectedPrompt ? selectedPrompt.name : "Select a prompt"}
-          </h3>
-        </div>
-        <div className="p-4">
-          {error ? (
-            <Alert variant="destructive">
-              <AlertCircle className="h-4 w-4" />
-              <AlertTitle>Error</AlertTitle>
-              <AlertDescription>{error}</AlertDescription>
-            </Alert>
-          ) : selectedPrompt ? (
-            <div className="space-y-4">
-              {selectedPrompt.description && (
-                <p className="text-sm text-gray-600">
-                  {selectedPrompt.description}
-                </p>
-              )}
-              {selectedPrompt.arguments?.map((arg) => (
-                <div key={arg.name}>
-                  <Label htmlFor={arg.name}>{arg.name}</Label>
-                  <Combobox
-                    id={arg.name}
-                    placeholder={`Enter ${arg.name}`}
-                    value={promptArgs[arg.name] || ""}
-                    onChange={(value) => handleInputChange(arg.name, value)}
-                    onInputChange={(value) =>
-                      handleInputChange(arg.name, value)
-                    }
-                    options={completions[arg.name] || []}
-                  />
-
-                  {arg.description && (
-                    <p className="text-xs text-gray-500 mt-1">
-                      {arg.description}
-                      {arg.required && (
-                        <span className="text-xs mt-1 ml-1">(Required)</span>
-                      )}
-                    </p>
-                  )}
-                </div>
-              ))}
-              <Button onClick={handleGetPrompt} className="w-full">
-                Get Prompt
-              </Button>
-              {promptContent && (
-                <JsonView data={promptContent} withCopyButton={false} />
-              )}
-            </div>
-          ) : (
-            <Alert>
-              <AlertDescription>
-                Select a prompt from the list to view and use it
-              </AlertDescription>
-            </Alert>
+    <TabsContent value="prompts">
+      <div className="grid grid-cols-2 gap-4">
+        <ListPane
+          items={prompts}
+          listItems={listPrompts}
+          clearItems={() => {
+            clearPrompts();
+            setSelectedPrompt(null);
+          }}
+          setSelectedItem={(prompt) => {
+            setSelectedPrompt(prompt);
+            setPromptArgs({});
+          }}
+          renderItem={(prompt) => (
+            <>
+              <span className="flex-1">{prompt.name}</span>
+              <span className="text-sm text-gray-500">
+                {prompt.description}
+              </span>
+            </>
           )}
+          title="Prompts"
+          buttonText={nextCursor ? "List More Prompts" : "List Prompts"}
+          isButtonDisabled={!nextCursor && prompts.length > 0}
+        />
+
+        <div className="bg-card rounded-lg shadow">
+          <div className="p-4 border-b border-gray-200 dark:border-gray-800">
+            <h3 className="font-semibold">
+              {selectedPrompt ? selectedPrompt.name : "Select a prompt"}
+            </h3>
+          </div>
+          <div className="p-4">
+            {error ? (
+              <Alert variant="destructive">
+                <AlertCircle className="h-4 w-4" />
+                <AlertTitle>Error</AlertTitle>
+                <AlertDescription>{error}</AlertDescription>
+              </Alert>
+            ) : selectedPrompt ? (
+              <div className="space-y-4">
+                {selectedPrompt.description && (
+                  <p className="text-sm text-gray-600">
+                    {selectedPrompt.description}
+                  </p>
+                )}
+                {selectedPrompt.arguments?.map((arg) => (
+                  <div key={arg.name}>
+                    <Label htmlFor={arg.name}>{arg.name}</Label>
+                    <Combobox
+                      id={arg.name}
+                      placeholder={`Enter ${arg.name}`}
+                      value={promptArgs[arg.name] || ""}
+                      onChange={(value) => handleInputChange(arg.name, value)}
+                      onInputChange={(value) =>
+                        handleInputChange(arg.name, value)
+                      }
+                      options={completions[arg.name] || []}
+                    />
+
+                    {arg.description && (
+                      <p className="text-xs text-gray-500 mt-1">
+                        {arg.description}
+                        {arg.required && (
+                          <span className="text-xs mt-1 ml-1">(Required)</span>
+                        )}
+                      </p>
+                    )}
+                  </div>
+                ))}
+                <Button onClick={handleGetPrompt} className="w-full">
+                  Get Prompt
+                </Button>
+                {promptContent && (
+                  <JsonView data={promptContent} withCopyButton={false} />
+                )}
+              </div>
+            ) : (
+              <Alert>
+                <AlertDescription>
+                  Select a prompt from the list to view and use it
+                </AlertDescription>
+              </Alert>
+            )}
+          </div>
         </div>
       </div>
     </TabsContent>

client/src/components/ResourcesTab.tsx

@@ -104,162 +104,177 @@ const ResourcesTab = ({
     if (selectedTemplate) {
       const uri = fillTemplate(selectedTemplate.uriTemplate, templateValues);
       readResource(uri);
-      setSelectedTemplate(null);
       // We don't have the full Resource object here, so we create a partial one
       setSelectedResource({ uri, name: uri } as Resource);
     }
   };
 
   return (
-    <TabsContent value="resources" className="grid grid-cols-3 gap-4">
-      <ListPane
-        items={resources}
-        listItems={listResources}
-        clearItems={clearResources}
-        setSelectedItem={(resource) => {
-          setSelectedResource(resource);
-          readResource(resource.uri);
-          setSelectedTemplate(null);
-        }}
-        renderItem={(resource) => (
-          <div className="flex items-center w-full">
-            <FileText className="w-4 h-4 mr-2 flex-shrink-0 text-gray-500" />
-            <span className="flex-1 truncate" title={resource.uri.toString()}>
-              {resource.name}
-            </span>
-            <ChevronRight className="w-4 h-4 flex-shrink-0 text-gray-400" />
-          </div>
-        )}
-        title="Resources"
-        buttonText={nextCursor ? "List More Resources" : "List Resources"}
-        isButtonDisabled={!nextCursor && resources.length > 0}
-      />
-
-      <ListPane
-        items={resourceTemplates}
-        listItems={listResourceTemplates}
-        clearItems={clearResourceTemplates}
-        setSelectedItem={(template) => {
-          setSelectedTemplate(template);
-          setSelectedResource(null);
-          setTemplateValues({});
-        }}
-        renderItem={(template) => (
-          <div className="flex items-center w-full">
-            <FileText className="w-4 h-4 mr-2 flex-shrink-0 text-gray-500" />
-            <span className="flex-1 truncate" title={template.uriTemplate}>
-              {template.name}
-            </span>
-            <ChevronRight className="w-4 h-4 flex-shrink-0 text-gray-400" />
-          </div>
-        )}
-        title="Resource Templates"
-        buttonText={
-          nextTemplateCursor ? "List More Templates" : "List Templates"
-        }
-        isButtonDisabled={!nextTemplateCursor && resourceTemplates.length > 0}
-      />
-
-      <div className="bg-card rounded-lg shadow">
-        <div className="p-4 border-b border-gray-200 flex justify-between items-center">
-          <h3
-            className="font-semibold truncate"
-            title={selectedResource?.name || selectedTemplate?.name}
-          >
-            {selectedResource
-              ? selectedResource.name
-              : selectedTemplate
-                ? selectedTemplate.name
-                : "Select a resource or template"}
-          </h3>
-          {selectedResource && (
-            <div className="flex row-auto gap-1 justify-end w-2/5">
-              {resourceSubscriptionsSupported &&
-                !resourceSubscriptions.has(selectedResource.uri) && (
-                  <Button
-                    variant="outline"
-                    size="sm"
-                    onClick={() => subscribeToResource(selectedResource.uri)}
-                  >
-                    Subscribe
-                  </Button>
-                )}
-              {resourceSubscriptionsSupported &&
-                resourceSubscriptions.has(selectedResource.uri) && (
-                  <Button
-                    variant="outline"
-                    size="sm"
-                    onClick={() =>
-                      unsubscribeFromResource(selectedResource.uri)
-                    }
-                  >
-                    Unsubscribe
-                  </Button>
-                )}
-              <Button
-                variant="outline"
-                size="sm"
-                onClick={() => readResource(selectedResource.uri)}
-              >
-                <RefreshCw className="w-4 h-4 mr-2" />
-                Refresh
-              </Button>
+    <TabsContent value="resources">
+      <div className="grid grid-cols-3 gap-4">
+        <ListPane
+          items={resources}
+          listItems={listResources}
+          clearItems={() => {
+            clearResources();
+            // Condition to check if selected resource is not resource template's resource
+            if (!selectedTemplate) {
+              setSelectedResource(null);
+            }
+          }}
+          setSelectedItem={(resource) => {
+            setSelectedResource(resource);
+            readResource(resource.uri);
+            setSelectedTemplate(null);
+          }}
+          renderItem={(resource) => (
+            <div className="flex items-center w-full">
+              <FileText className="w-4 h-4 mr-2 flex-shrink-0 text-gray-500" />
+              <span className="flex-1 truncate" title={resource.uri.toString()}>
+                {resource.name}
+              </span>
+              <ChevronRight className="w-4 h-4 flex-shrink-0 text-gray-400" />
             </div>
           )}
-        </div>
-        <div className="p-4">
-          {error ? (
-            <Alert variant="destructive">
-              <AlertCircle className="h-4 w-4" />
-              <AlertTitle>Error</AlertTitle>
-              <AlertDescription>{error}</AlertDescription>
-            </Alert>
-          ) : selectedResource ? (
-            <JsonView
-              data={resourceContent}
-              className="bg-gray-50 dark:bg-gray-800 p-4 rounded text-sm overflow-auto max-h-96 text-gray-900 dark:text-gray-100"
-            />
-          ) : selectedTemplate ? (
-            <div className="space-y-4">
-              <p className="text-sm text-gray-600">
-                {selectedTemplate.description}
-              </p>
-              {selectedTemplate.uriTemplate
-                .match(/{([^}]+)}/g)
-                ?.map((param) => {
-                  const key = param.slice(1, -1);
-                  return (
-                    <div key={key}>
-                      <Label htmlFor={key}>{key}</Label>
-                      <Combobox
-                        id={key}
-                        placeholder={`Enter ${key}`}
-                        value={templateValues[key] || ""}
-                        onChange={(value) =>
-                          handleTemplateValueChange(key, value)
-                        }
-                        onInputChange={(value) =>
-                          handleTemplateValueChange(key, value)
-                        }
-                        options={completions[key] || []}
-                      />
-                    </div>
-                  );
-                })}
-              <Button
-                onClick={handleReadTemplateResource}
-                disabled={Object.keys(templateValues).length === 0}
-              >
-                Read Resource
-              </Button>
+          title="Resources"
+          buttonText={nextCursor ? "List More Resources" : "List Resources"}
+          isButtonDisabled={!nextCursor && resources.length > 0}
+        />
+
+        <ListPane
+          items={resourceTemplates}
+          listItems={listResourceTemplates}
+          clearItems={() => {
+            clearResourceTemplates();
+            // Condition to check if selected resource is resource template's resource
+            if (selectedTemplate) {
+              setSelectedResource(null);
+            }
+            setSelectedTemplate(null);
+          }}
+          setSelectedItem={(template) => {
+            setSelectedTemplate(template);
+            setSelectedResource(null);
+            setTemplateValues({});
+          }}
+          renderItem={(template) => (
+            <div className="flex items-center w-full">
+              <FileText className="w-4 h-4 mr-2 flex-shrink-0 text-gray-500" />
+              <span className="flex-1 truncate" title={template.uriTemplate}>
+                {template.name}
+              </span>
+              <ChevronRight className="w-4 h-4 flex-shrink-0 text-gray-400" />
             </div>
-          ) : (
-            <Alert>
-              <AlertDescription>
-                Select a resource or template from the list to view its contents
-              </AlertDescription>
-            </Alert>
           )}
+          title="Resource Templates"
+          buttonText={
+            nextTemplateCursor ? "List More Templates" : "List Templates"
+          }
+          isButtonDisabled={!nextTemplateCursor && resourceTemplates.length > 0}
+        />
+
+        <div className="bg-card rounded-lg shadow">
+          <div className="p-4 border-b border-gray-200 dark:border-gray-800 flex justify-between items-center">
+            <h3
+              className="font-semibold truncate"
+              title={selectedResource?.name || selectedTemplate?.name}
+            >
+              {selectedResource
+                ? selectedResource.name
+                : selectedTemplate
+                  ? selectedTemplate.name
+                  : "Select a resource or template"}
+            </h3>
+            {selectedResource && (
+              <div className="flex row-auto gap-1 justify-end w-2/5">
+                {resourceSubscriptionsSupported &&
+                  !resourceSubscriptions.has(selectedResource.uri) && (
+                    <Button
+                      variant="outline"
+                      size="sm"
+                      onClick={() => subscribeToResource(selectedResource.uri)}
+                    >
+                      Subscribe
+                    </Button>
+                  )}
+                {resourceSubscriptionsSupported &&
+                  resourceSubscriptions.has(selectedResource.uri) && (
+                    <Button
+                      variant="outline"
+                      size="sm"
+                      onClick={() =>
+                        unsubscribeFromResource(selectedResource.uri)
+                      }
+                    >
+                      Unsubscribe
+                    </Button>
+                  )}
+                <Button
+                  variant="outline"
+                  size="sm"
+                  onClick={() => readResource(selectedResource.uri)}
+                >
+                  <RefreshCw className="w-4 h-4 mr-2" />
+                  Refresh
+                </Button>
+              </div>
+            )}
+          </div>
+          <div className="p-4">
+            {error ? (
+              <Alert variant="destructive">
+                <AlertCircle className="h-4 w-4" />
+                <AlertTitle>Error</AlertTitle>
+                <AlertDescription>{error}</AlertDescription>
+              </Alert>
+            ) : selectedResource ? (
+              <JsonView
+                data={resourceContent}
+                className="bg-gray-50 dark:bg-gray-800 p-4 rounded text-sm overflow-auto max-h-96 text-gray-900 dark:text-gray-100"
+              />
+            ) : selectedTemplate ? (
+              <div className="space-y-4">
+                <p className="text-sm text-gray-600">
+                  {selectedTemplate.description}
+                </p>
+                {selectedTemplate.uriTemplate
+                  .match(/{([^}]+)}/g)
+                  ?.map((param) => {
+                    const key = param.slice(1, -1);
+                    return (
+                      <div key={key}>
+                        <Label htmlFor={key}>{key}</Label>
+                        <Combobox
+                          id={key}
+                          placeholder={`Enter ${key}`}
+                          value={templateValues[key] || ""}
+                          onChange={(value) =>
+                            handleTemplateValueChange(key, value)
+                          }
+                          onInputChange={(value) =>
+                            handleTemplateValueChange(key, value)
+                          }
+                          options={completions[key] || []}
+                        />
+                      </div>
+                    );
+                  })}
+                <Button
+                  onClick={handleReadTemplateResource}
+                  disabled={Object.keys(templateValues).length === 0}
+                >
+                  Read Resource
+                </Button>
+              </div>
+            ) : (
+              <Alert>
+                <AlertDescription>
+                  Select a resource or template from the list to view its
+                  contents
+                </AlertDescription>
+              </Alert>
+            )}
+          </div>
         </div>
       </div>
     </TabsContent>

client/src/components/RootsTab.tsx

@@ -35,40 +35,42 @@ const RootsTab = ({
   };
 
   return (
-    <TabsContent value="roots" className="space-y-4">
-      <Alert>
-        <AlertDescription>
-          Configure the root directories that the server can access
-        </AlertDescription>
-      </Alert>
+    <TabsContent value="roots">
+      <div className="space-y-4">
+        <Alert>
+          <AlertDescription>
+            Configure the root directories that the server can access
+          </AlertDescription>
+        </Alert>
 
-      {roots.map((root, index) => (
-        <div key={index} className="flex gap-2 items-center">
-          <Input
-            placeholder="file:// URI"
-            value={root.uri}
-            onChange={(e) => updateRoot(index, "uri", e.target.value)}
-            className="flex-1"
-          />
-          <Button
-            variant="destructive"
-            size="sm"
-            onClick={() => removeRoot(index)}
-          >
-            <Minus className="h-4 w-4" />
+        {roots.map((root, index) => (
+          <div key={index} className="flex gap-2 items-center">
+            <Input
+              placeholder="file:// URI"
+              value={root.uri}
+              onChange={(e) => updateRoot(index, "uri", e.target.value)}
+              className="flex-1"
+            />
+            <Button
+              variant="destructive"
+              size="sm"
+              onClick={() => removeRoot(index)}
+            >
+              <Minus className="h-4 w-4" />
+            </Button>
+          </div>
+        ))}
+
+        <div className="flex gap-2">
+          <Button variant="outline" onClick={addRoot}>
+            <Plus className="h-4 w-4 mr-2" />
+            Add Root
+          </Button>
+          <Button onClick={handleSave}>
+            <Save className="h-4 w-4 mr-2" />
+            Save Changes
           </Button>
         </div>
-      ))}
-
-      <div className="flex gap-2">
-        <Button variant="outline" onClick={addRoot}>
-          <Plus className="h-4 w-4 mr-2" />
-          Add Root
-        </Button>
-        <Button onClick={handleSave}>
-          <Save className="h-4 w-4 mr-2" />
-          Save Changes
-        </Button>
       </div>
     </TabsContent>
   );

client/src/components/SamplingTab.tsx

@@ -33,33 +33,37 @@ const SamplingTab = ({ pendingRequests, onApprove, onReject }: Props) => {
   };
 
   return (
-    <TabsContent value="sampling" className="h-96">
-      <Alert>
-        <AlertDescription>
-          When the server requests LLM sampling, requests will appear here for
-          approval.
-        </AlertDescription>
-      </Alert>
-      <div className="mt-4 space-y-4">
-        <h3 className="text-lg font-semibold">Recent Requests</h3>
-        {pendingRequests.map((request) => (
-          <div key={request.id} className="p-4 border rounded-lg space-y-4">
-            <JsonView
-              className="bg-gray-50 dark:bg-gray-800 dark:text-gray-100 rounded"
-              data={JSON.stringify(request.request)}
-            />
+    <TabsContent value="sampling">
+      <div className="h-96">
+        <Alert>
+          <AlertDescription>
+            When the server requests LLM sampling, requests will appear here for
+            approval.
+          </AlertDescription>
+        </Alert>
+        <div className="mt-4 space-y-4">
+          <h3 className="text-lg font-semibold">Recent Requests</h3>
+          {pendingRequests.map((request) => (
+            <div key={request.id} className="p-4 border rounded-lg space-y-4">
+              <JsonView
+                className="bg-gray-50 dark:bg-gray-800 dark:text-gray-100 rounded"
+                data={JSON.stringify(request.request)}
+              />
 
-            <div className="flex space-x-2">
-              <Button onClick={() => handleApprove(request.id)}>Approve</Button>
-              <Button variant="outline" onClick={() => onReject(request.id)}>
-                Reject
-              </Button>
+              <div className="flex space-x-2">
+                <Button onClick={() => handleApprove(request.id)}>
+                  Approve
+                </Button>
+                <Button variant="outline" onClick={() => onReject(request.id)}>
+                  Reject
+                </Button>
+              </div>
             </div>
-          </div>
-        ))}
-        {pendingRequests.length === 0 && (
-          <p className="text-gray-500">No pending requests</p>
-        )}
+          ))}
+          {pendingRequests.length === 0 && (
+            <p className="text-gray-500">No pending requests</p>
+          )}
+        </div>
       </div>
     </TabsContent>
   );

client/src/components/Sidebar.tsx

@@ -51,9 +51,12 @@ interface SidebarProps {
   setEnv: (env: Record<string, string>) => void;
   bearerToken: string;
   setBearerToken: (token: string) => void;
+  headerName?: string;
+  setHeaderName?: (name: string) => void;
   onConnect: () => void;
   onDisconnect: () => void;
   stdErrNotifications: StdErrNotification[];
+  clearStdErrNotifications: () => void;
   logLevel: LoggingLevel;
   sendLogLevelRequest: (level: LoggingLevel) => void;
   loggingSupported: boolean;
@@ -75,9 +78,12 @@ const Sidebar = ({
   setEnv,
   bearerToken,
   setBearerToken,
+  headerName,
+  setHeaderName,
   onConnect,
   onDisconnect,
   stdErrNotifications,
+  clearStdErrNotifications,
   logLevel,
   sendLogLevelRequest,
   loggingSupported,
@@ -92,7 +98,7 @@ const Sidebar = ({
 
   return (
     <div className="w-80 bg-card border-r border-border flex flex-col h-full">
-      <div className="flex items-center justify-between p-4 border-b border-gray-200">
+      <div className="flex items-center justify-between p-4 border-b border-gray-200 dark:border-gray-800">
         <div className="flex items-center">
           <h1 className="ml-2 text-lg font-semibold">
             MCP Inspector v{version}
@@ -103,14 +109,19 @@ const Sidebar = ({
       <div className="p-4 flex-1 overflow-auto">
         <div className="space-y-4">
           <div className="space-y-2">
-            <label className="text-sm font-medium">Transport Type</label>
+            <label
+              className="text-sm font-medium"
+              htmlFor="transport-type-select"
+            >
+              Transport Type
+            </label>
             <Select
               value={transportType}
               onValueChange={(value: "stdio" | "sse") =>
                 setTransportType(value)
               }
             >
-              <SelectTrigger>
+              <SelectTrigger id="transport-type-select">
                 <SelectValue placeholder="Select transport type" />
               </SelectTrigger>
               <SelectContent>
@@ -123,8 +134,11 @@ const Sidebar = ({
           {transportType === "stdio" ? (
             <>
               <div className="space-y-2">
-                <label className="text-sm font-medium">Command</label>
+                <label className="text-sm font-medium" htmlFor="command-input">
+                  Command
+                </label>
                 <Input
+                  id="command-input"
                   placeholder="Command"
                   value={command}
                   onChange={(e) => setCommand(e.target.value)}
@@ -132,8 +146,14 @@ const Sidebar = ({
                 />
               </div>
               <div className="space-y-2">
-                <label className="text-sm font-medium">Arguments</label>
+                <label
+                  className="text-sm font-medium"
+                  htmlFor="arguments-input"
+                >
+                  Arguments
+                </label>
                 <Input
+                  id="arguments-input"
                   placeholder="Arguments (space-separated)"
                   value={args}
                   onChange={(e) => setArgs(e.target.value)}
@@ -144,8 +164,11 @@ const Sidebar = ({
           ) : (
             <>
               <div className="space-y-2">
-                <label className="text-sm font-medium">URL</label>
+                <label className="text-sm font-medium" htmlFor="sse-url-input">
+                  URL
+                </label>
                 <Input
+                  id="sse-url-input"
                   placeholder="URL"
                   value={sseUrl}
                   onChange={(e) => setSseUrl(e.target.value)}
@@ -157,6 +180,8 @@ const Sidebar = ({
                   variant="outline"
                   onClick={() => setShowBearerToken(!showBearerToken)}
                   className="flex items-center w-full"
+                  data-testid="auth-button"
+                  aria-expanded={showBearerToken}
                 >
                   {showBearerToken ? (
                     <ChevronDown className="w-4 h-4 mr-2" />
@@ -167,11 +192,28 @@ const Sidebar = ({
                 </Button>
                 {showBearerToken && (
                   <div className="space-y-2">
-                    <label className="text-sm font-medium">Bearer Token</label>
+                    <label className="text-sm font-medium">Header Name</label>
                     <Input
+                      placeholder="Authorization"
+                      onChange={(e) =>
+                        setHeaderName && setHeaderName(e.target.value)
+                      }
+                      data-testid="header-input"
+                      className="font-mono"
+                      value={headerName}
+                    />
+                    <label
+                      className="text-sm font-medium"
+                      htmlFor="bearer-token-input"
+                    >
+                      Bearer Token
+                    </label>
+                    <Input
+                      id="bearer-token-input"
                       placeholder="Bearer Token"
                       value={bearerToken}
                       onChange={(e) => setBearerToken(e.target.value)}
+                      data-testid="bearer-token-input"
                       className="font-mono"
                       type="password"
                     />
@@ -187,6 +229,7 @@ const Sidebar = ({
                 onClick={() => setShowEnvVars(!showEnvVars)}
                 className="flex items-center w-full"
                 data-testid="env-vars-button"
+                aria-expanded={showEnvVars}
               >
                 {showEnvVars ? (
                   <ChevronDown className="w-4 h-4 mr-2" />
@@ -201,6 +244,7 @@ const Sidebar = ({
                     <div key={idx} className="space-y-2 pb-4">
                       <div className="flex gap-2">
                         <Input
+                          aria-label={`Environment variable key ${idx + 1}`}
                           placeholder="Key"
                           value={key}
                           onChange={(e) => {
@@ -243,6 +287,7 @@ const Sidebar = ({
                       </div>
                       <div className="flex gap-2">
                         <Input
+                          aria-label={`Environment variable value ${idx + 1}`}
                           type={shownEnvVars.has(key) ? "text" : "password"}
                           placeholder="Value"
                           value={value}
@@ -309,6 +354,7 @@ const Sidebar = ({
               onClick={() => setShowConfig(!showConfig)}
               className="flex items-center w-full"
               data-testid="config-button"
+              aria-expanded={showConfig}
             >
               {showConfig ? (
                 <ChevronDown className="w-4 h-4 mr-2" />
@@ -325,8 +371,11 @@ const Sidebar = ({
                   return (
                     <div key={key} className="space-y-2">
                       <div className="flex items-center gap-1">
-                        <label className="text-sm font-medium text-green-600">
-                          {configKey}
+                        <label
+                          className="text-sm font-medium text-green-600 break-all"
+                          htmlFor={`${configKey}-input`}
+                        >
+                          {configItem.label}
                         </label>
                         <Tooltip>
                           <TooltipTrigger asChild>
@@ -339,6 +388,7 @@ const Sidebar = ({
                       </div>
                       {typeof configItem.value === "number" ? (
                         <Input
+                          id={`${configKey}-input`}
                           type="number"
                           data-testid={`${configKey}-input`}
                           value={configItem.value}
@@ -365,7 +415,7 @@ const Sidebar = ({
                             setConfig(newConfig);
                           }}
                         >
-                          <SelectTrigger>
+                          <SelectTrigger id={`${configKey}-input`}>
                             <SelectValue />
                           </SelectTrigger>
                           <SelectContent>
@@ -375,6 +425,7 @@ const Sidebar = ({
                         </Select>
                       ) : (
                         <Input
+                          id={`${configKey}-input`}
                           data-testid={`${configKey}-input`}
                           value={configItem.value}
                           onChange={(e) => {
@@ -398,7 +449,13 @@ const Sidebar = ({
           <div className="space-y-2">
             {connectionStatus === "connected" && (
               <div className="grid grid-cols-2 gap-4">
-                <Button data-testid="connect-button" onClick={onConnect}>
+                <Button
+                  data-testid="connect-button"
+                  onClick={() => {
+                    onDisconnect();
+                    onConnect();
+                  }}
+                >
                   <RotateCcw className="w-4 h-4 mr-2" />
                   {transportType === "stdio" ? "Restart" : "Reconnect"}
                 </Button>
@@ -448,19 +505,26 @@ const Sidebar = ({
 
             {loggingSupported && connectionStatus === "connected" && (
               <div className="space-y-2">
-                <label className="text-sm font-medium">Logging Level</label>
+                <label
+                  className="text-sm font-medium"
+                  htmlFor="logging-level-select"
+                >
+                  Logging Level
+                </label>
                 <Select
                   value={logLevel}
                   onValueChange={(value: LoggingLevel) =>
                     sendLogLevelRequest(value)
                   }
                 >
-                  <SelectTrigger>
+                  <SelectTrigger id="logging-level-select">
                     <SelectValue placeholder="Select logging level" />
                   </SelectTrigger>
                   <SelectContent>
                     {Object.values(LoggingLevelSchema.enum).map((level) => (
-                      <SelectItem value={level}>{level}</SelectItem>
+                      <SelectItem key={level} value={level}>
+                        {level}
+                      </SelectItem>
                     ))}
                   </SelectContent>
                 </Select>
@@ -470,9 +534,19 @@ const Sidebar = ({
             {stdErrNotifications.length > 0 && (
               <>
                 <div className="mt-4 border-t border-gray-200 pt-4">
-                  <h3 className="text-sm font-medium">
-                    Error output from MCP server
-                  </h3>
+                  <div className="flex justify-between items-center">
+                    <h3 className="text-sm font-medium">
+                      Error output from MCP server
+                    </h3>
+                    <Button
+                      variant="outline"
+                      size="sm"
+                      onClick={clearStdErrNotifications}
+                      className="h-8 px-2"
+                    >
+                      Clear
+                    </Button>
+                  </div>
                   <div className="mt-2 max-h-80 overflow-y-auto">
                     {stdErrNotifications.map((notification, index) => (
                       <div

client/src/components/ToolsTab.tsx

@@ -5,7 +5,8 @@ import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { TabsContent } from "@/components/ui/tabs";
 import { Textarea } from "@/components/ui/textarea";
-import DynamicJsonForm, { JsonSchemaType, JsonValue } from "./DynamicJsonForm";
+import DynamicJsonForm from "./DynamicJsonForm";
+import type { JsonValue, JsonSchemaType } from "@/utils/jsonUtils";
 import { generateDefaultValue } from "@/utils/schemaUtils";
 import {
   CallToolResultSchema,
@@ -13,7 +14,7 @@ import {
   ListToolsResult,
   Tool,
 } from "@modelcontextprotocol/sdk/types.js";
-import { Send } from "lucide-react";
+import { Loader2, Send } from "lucide-react";
 import { useEffect, useState } from "react";
 import ListPane from "./ListPane";
 import JsonView from "./JsonView";
@@ -31,7 +32,7 @@ const ToolsTab = ({
   tools: Tool[];
   listTools: () => void;
   clearTools: () => void;
-  callTool: (name: string, params: Record<string, unknown>) => void;
+  callTool: (name: string, params: Record<string, unknown>) => Promise<void>;
   selectedTool: Tool | null;
   setSelectedTool: (tool: Tool | null) => void;
   toolResult: CompatibilityCallToolResult | null;
@@ -39,8 +40,16 @@ const ToolsTab = ({
   error: string | null;
 }) => {
   const [params, setParams] = useState<Record<string, unknown>>({});
+  const [isToolRunning, setIsToolRunning] = useState(false);
+
   useEffect(() => {
-    setParams({});
+    const params = Object.entries(
+      selectedTool?.inputSchema.properties ?? [],
+    ).map(([key, value]) => [
+      key,
+      generateDefaultValue(value as JsonSchemaType),
+    ]);
+    setParams(Object.fromEntries(params));
   }, [selectedTool]);
 
   const renderToolResult = () => {
@@ -66,11 +75,18 @@ const ToolsTab = ({
       return (
         <>
           <h4 className="font-semibold mb-2">
-            Tool Result: {isError ? "Error" : "Success"}
+            Tool Result:{" "}
+            {isError ? (
+              <span className="text-red-600 font-semibold">Error</span>
+            ) : (
+              <span className="text-green-600 font-semibold">Success</span>
+            )}
           </h4>
           {structuredResult.content.map((item, index) => (
             <div key={index} className="mb-2">
-              {item.type === "text" && <JsonView data={item.text} />}
+              {item.type === "text" && (
+                <JsonView data={item.text} isError={isError} />
+              )}
               {item.type === "image" && (
                 <img
                   src={`data:${item.mimeType};base64,${item.data}`}
@@ -106,147 +122,179 @@ const ToolsTab = ({
   };
 
   return (
-    <TabsContent value="tools" className="grid grid-cols-2 gap-4">
-      <ListPane
-        items={tools}
-        listItems={listTools}
-        clearItems={() => {
-          clearTools();
-          setSelectedTool(null);
-        }}
-        setSelectedItem={setSelectedTool}
-        renderItem={(tool) => (
-          <>
-            <span className="flex-1">{tool.name}</span>
-            <span className="text-sm text-gray-500 text-right">
-              {tool.description}
-            </span>
-          </>
-        )}
-        title="Tools"
-        buttonText={nextCursor ? "List More Tools" : "List Tools"}
-        isButtonDisabled={!nextCursor && tools.length > 0}
-      />
+    <TabsContent value="tools">
+      <div className="grid grid-cols-2 gap-4">
+        <ListPane
+          items={tools}
+          listItems={listTools}
+          clearItems={() => {
+            clearTools();
+            setSelectedTool(null);
+          }}
+          setSelectedItem={setSelectedTool}
+          renderItem={(tool) => (
+            <>
+              <span className="flex-1">{tool.name}</span>
+              <span className="text-sm text-gray-500 text-right">
+                {tool.description}
+              </span>
+            </>
+          )}
+          title="Tools"
+          buttonText={nextCursor ? "List More Tools" : "List Tools"}
+          isButtonDisabled={!nextCursor && tools.length > 0}
+        />
 
-      <div className="bg-card rounded-lg shadow">
-        <div className="p-4 border-b border-gray-200">
-          <h3 className="font-semibold">
-            {selectedTool ? selectedTool.name : "Select a tool"}
-          </h3>
-        </div>
-        <div className="p-4">
-          {selectedTool ? (
-            <div className="space-y-4">
-              <p className="text-sm text-gray-600">
-                {selectedTool.description}
-              </p>
-              {Object.entries(selectedTool.inputSchema.properties ?? []).map(
-                ([key, value]) => {
-                  const prop = value as JsonSchemaType;
-                  return (
-                    <div key={key}>
-                      <Label
-                        htmlFor={key}
-                        className="block text-sm font-medium text-gray-700"
-                      >
-                        {key}
-                      </Label>
-                      {prop.type === "boolean" ? (
-                        <div className="flex items-center space-x-2 mt-2">
-                          <Checkbox
+        <div className="bg-card rounded-lg shadow">
+          <div className="p-4 border-b border-gray-200 dark:border-gray-800">
+            <h3 className="font-semibold">
+              {selectedTool ? selectedTool.name : "Select a tool"}
+            </h3>
+          </div>
+          <div className="p-4">
+            {selectedTool ? (
+              <div className="space-y-4">
+                <p className="text-sm text-gray-600">
+                  {selectedTool.description}
+                </p>
+                {Object.entries(selectedTool.inputSchema.properties ?? []).map(
+                  ([key, value]) => {
+                    const prop = value as JsonSchemaType;
+                    return (
+                      <div key={key}>
+                        <Label
+                          htmlFor={key}
+                          className="block text-sm font-medium text-gray-700"
+                        >
+                          {key}
+                        </Label>
+                        {prop.type === "boolean" ? (
+                          <div className="flex items-center space-x-2 mt-2">
+                            <Checkbox
+                              id={key}
+                              name={key}
+                              checked={!!params[key]}
+                              onCheckedChange={(checked: boolean) =>
+                                setParams({
+                                  ...params,
+                                  [key]: checked,
+                                })
+                              }
+                            />
+                            <label
+                              htmlFor={key}
+                              className="text-sm font-medium text-gray-700 dark:text-gray-300"
+                            >
+                              {prop.description || "Toggle this option"}
+                            </label>
+                          </div>
+                        ) : prop.type === "string" ? (
+                          <Textarea
                             id={key}
                             name={key}
-                            checked={!!params[key]}
-                            onCheckedChange={(checked: boolean) =>
+                            placeholder={prop.description}
+                            value={(params[key] as string) ?? ""}
+                            onChange={(e) =>
                               setParams({
                                 ...params,
-                                [key]: checked,
+                                [key]: e.target.value,
                               })
                             }
+                            className="mt-1"
                           />
-                          <label
-                            htmlFor={key}
-                            className="text-sm font-medium text-gray-700 dark:text-gray-300"
-                          >
-                            {prop.description || "Toggle this option"}
-                          </label>
-                        </div>
-                      ) : prop.type === "string" ? (
-                        <Textarea
-                          id={key}
-                          name={key}
-                          placeholder={prop.description}
-                          value={(params[key] as string) ?? ""}
-                          onChange={(e) =>
-                            setParams({
-                              ...params,
-                              [key]: e.target.value,
-                            })
-                          }
-                          className="mt-1"
-                        />
-                      ) : prop.type === "object" || prop.type === "array" ? (
-                        <div className="mt-1">
-                          <DynamicJsonForm
-                            schema={{
-                              type: prop.type,
-                              properties: prop.properties,
-                              description: prop.description,
-                              items: prop.items,
-                            }}
-                            value={
-                              (params[key] as JsonValue) ??
-                              generateDefaultValue(prop)
-                            }
-                            onChange={(newValue: JsonValue) => {
+                        ) : prop.type === "object" || prop.type === "array" ? (
+                          <div className="mt-1">
+                            <DynamicJsonForm
+                              schema={{
+                                type: prop.type,
+                                properties: prop.properties,
+                                description: prop.description,
+                                items: prop.items,
+                              }}
+                              value={
+                                (params[key] as JsonValue) ??
+                                generateDefaultValue(prop)
+                              }
+                              onChange={(newValue: JsonValue) => {
+                                setParams({
+                                  ...params,
+                                  [key]: newValue,
+                                });
+                              }}
+                            />
+                          </div>
+                        ) : prop.type === "number" ||
+                          prop.type === "integer" ? (
+                          <Input
+                            type="number"
+                            id={key}
+                            name={key}
+                            placeholder={prop.description}
+                            value={(params[key] as string) ?? ""}
+                            onChange={(e) =>
                               setParams({
                                 ...params,
-                                [key]: newValue,
-                              });
-                            }}
+                                [key]: Number(e.target.value),
+                              })
+                            }
+                            className="mt-1"
                           />
-                        </div>
-                      ) : (
-                        <Input
-                          type={
-                            prop.type === "number" || prop.type === "integer"
-                              ? "number"
-                              : "text"
-                          }
-                          id={key}
-                          name={key}
-                          placeholder={prop.description}
-                          value={(params[key] as string) ?? ""}
-                          onChange={(e) =>
-                            setParams({
-                              ...params,
-                              [key]:
-                                prop.type === "number" ||
-                                prop.type === "integer"
-                                  ? Number(e.target.value)
-                                  : e.target.value,
-                            })
-                          }
-                          className="mt-1"
-                        />
-                      )}
-                    </div>
-                  );
-                },
-              )}
-              <Button onClick={() => callTool(selectedTool.name, params)}>
-                <Send className="w-4 h-4 mr-2" />
-                Run Tool
-              </Button>
-              {toolResult && renderToolResult()}
-            </div>
-          ) : (
-            <Alert>
-              <AlertDescription>
-                Select a tool from the list to view its details and run it
-              </AlertDescription>
-            </Alert>
-          )}
+                        ) : (
+                          <div className="mt-1">
+                            <DynamicJsonForm
+                              schema={{
+                                type: prop.type,
+                                properties: prop.properties,
+                                description: prop.description,
+                                items: prop.items,
+                              }}
+                              value={params[key] as JsonValue}
+                              onChange={(newValue: JsonValue) => {
+                                setParams({
+                                  ...params,
+                                  [key]: newValue,
+                                });
+                              }}
+                            />
+                          </div>
+                        )}
+                      </div>
+                    );
+                  },
+                )}
+                <Button
+                  onClick={async () => {
+                    try {
+                      setIsToolRunning(true);
+                      await callTool(selectedTool.name, params);
+                    } finally {
+                      setIsToolRunning(false);
+                    }
+                  }}
+                  disabled={isToolRunning}
+                >
+                  {isToolRunning ? (
+                    <>
+                      <Loader2 className="w-4 h-4 mr-2 animate-spin" />
+                      Running...
+                    </>
+                  ) : (
+                    <>
+                      <Send className="w-4 h-4 mr-2" />
+                      Run Tool
+                    </>
+                  )}
+                </Button>
+                {toolResult && renderToolResult()}
+              </div>
+            ) : (
+              <Alert>
+                <AlertDescription>
+                  Select a tool from the list to view its details and run it
+                </AlertDescription>
+              </Alert>
+            )}
+          </div>
         </div>
       </div>
     </TabsContent>

client/src/components/__tests__/DynamicJsonForm.test.tsx

@@ -1,7 +1,7 @@
-import { render, screen, fireEvent } from "@testing-library/react";
+import { render, screen, fireEvent, waitFor } from "@testing-library/react";
 import { describe, it, expect, jest } from "@jest/globals";
 import DynamicJsonForm from "../DynamicJsonForm";
-import type { JsonSchemaType } from "../DynamicJsonForm";
+import type { JsonSchemaType } from "@/utils/jsonUtils";
 
 describe("DynamicJsonForm String Fields", () => {
   const renderForm = (props = {}) => {
@@ -93,3 +93,47 @@ describe("DynamicJsonForm Integer Fields", () => {
     });
   });
 });
+
+describe("DynamicJsonForm Complex Fields", () => {
+  const renderForm = (props = {}) => {
+    const defaultProps = {
+      schema: {
+        type: "object",
+        properties: {
+          // The simplified JsonSchemaType does not accept oneOf fields
+          // But they exist in the more-complete JsonSchema7Type
+          nested: { oneOf: [{ type: "string" }, { type: "integer" }] },
+        },
+      } as unknown as JsonSchemaType,
+      value: undefined,
+      onChange: jest.fn(),
+    };
+    return render(<DynamicJsonForm {...defaultProps} {...props} />);
+  };
+
+  describe("Basic Operations", () => {
+    it("should render textbox and autoformat button, but no switch-to-form button", () => {
+      renderForm();
+      const input = screen.getByRole("textbox");
+      expect(input).toHaveProperty("type", "textarea");
+      const buttons = screen.getAllByRole("button");
+      expect(buttons).toHaveLength(1);
+      expect(buttons[0]).toHaveProperty("textContent", "Format JSON");
+    });
+
+    it("should pass changed values to onChange", () => {
+      const onChange = jest.fn();
+      renderForm({ onChange });
+
+      const input = screen.getByRole("textbox");
+      fireEvent.change(input, {
+        target: { value: `{ "nested": "i am string" }` },
+      });
+
+      // The onChange handler is debounced when using the JSON view, so we need to wait a little bit
+      waitFor(() => {
+        expect(onChange).toHaveBeenCalledWith(`{ "nested": "i am string" }`);
+      });
+    });
+  });
+});

client/src/components/__tests__/Sidebar.test.tsx

@@ -1,4 +1,5 @@
 import { render, screen, fireEvent } from "@testing-library/react";
+import "@testing-library/jest-dom";
 import { describe, it, beforeEach, jest } from "@jest/globals";
 import Sidebar from "../Sidebar";
 import { DEFAULT_INSPECTOR_CONFIG } from "@/lib/constants";
@@ -29,6 +30,7 @@ describe("Sidebar Environment Variables", () => {
     onConnect: jest.fn(),
     onDisconnect: jest.fn(),
     stdErrNotifications: [],
+    clearStdErrNotifications: jest.fn(),
     logLevel: "info" as const,
     sendLogLevelRequest: jest.fn(),
     loggingSupported: true,
@@ -108,6 +110,157 @@ describe("Sidebar Environment Variables", () => {
     });
   });
 
+  describe("Authentication", () => {
+    const openAuthSection = () => {
+      const button = screen.getByTestId("auth-button");
+      fireEvent.click(button);
+    };
+
+    it("should update bearer token", () => {
+      const setBearerToken = jest.fn();
+      renderSidebar({
+        bearerToken: "",
+        setBearerToken,
+        transportType: "sse", // Set transport type to SSE
+      });
+
+      openAuthSection();
+
+      const tokenInput = screen.getByTestId("bearer-token-input");
+      fireEvent.change(tokenInput, { target: { value: "new_token" } });
+
+      expect(setBearerToken).toHaveBeenCalledWith("new_token");
+    });
+
+    it("should update header name", () => {
+      const setHeaderName = jest.fn();
+      renderSidebar({
+        headerName: "Authorization",
+        setHeaderName,
+        transportType: "sse",
+      });
+
+      openAuthSection();
+
+      const headerInput = screen.getByTestId("header-input");
+      fireEvent.change(headerInput, { target: { value: "X-Custom-Auth" } });
+
+      expect(setHeaderName).toHaveBeenCalledWith("X-Custom-Auth");
+    });
+
+    it("should clear bearer token", () => {
+      const setBearerToken = jest.fn();
+      renderSidebar({
+        bearerToken: "existing_token",
+        setBearerToken,
+        transportType: "sse", // Set transport type to SSE
+      });
+
+      openAuthSection();
+
+      const tokenInput = screen.getByTestId("bearer-token-input");
+      fireEvent.change(tokenInput, { target: { value: "" } });
+
+      expect(setBearerToken).toHaveBeenCalledWith("");
+    });
+
+    it("should properly render bearer token input", () => {
+      const { rerender } = renderSidebar({
+        bearerToken: "existing_token",
+        transportType: "sse", // Set transport type to SSE
+      });
+
+      openAuthSection();
+
+      // Token input should be a password field
+      const tokenInput = screen.getByTestId("bearer-token-input");
+      expect(tokenInput).toHaveProperty("type", "password");
+
+      // Update the token
+      fireEvent.change(tokenInput, { target: { value: "new_token" } });
+
+      // Rerender with updated token
+      rerender(
+        <TooltipProvider>
+          <Sidebar
+            {...defaultProps}
+            bearerToken="new_token"
+            transportType="sse"
+          />
+        </TooltipProvider>,
+      );
+
+      // Token input should still exist after update
+      expect(screen.getByTestId("bearer-token-input")).toBeInTheDocument();
+    });
+
+    it("should maintain token visibility state after update", () => {
+      const { rerender } = renderSidebar({
+        bearerToken: "existing_token",
+        transportType: "sse", // Set transport type to SSE
+      });
+
+      openAuthSection();
+
+      // Token input should be a password field
+      const tokenInput = screen.getByTestId("bearer-token-input");
+      expect(tokenInput).toHaveProperty("type", "password");
+
+      // Update the token
+      fireEvent.change(tokenInput, { target: { value: "new_token" } });
+
+      // Rerender with updated token
+      rerender(
+        <TooltipProvider>
+          <Sidebar
+            {...defaultProps}
+            bearerToken="new_token"
+            transportType="sse"
+          />
+        </TooltipProvider>,
+      );
+
+      // Token input should still exist after update
+      expect(screen.getByTestId("bearer-token-input")).toBeInTheDocument();
+    });
+
+    it("should maintain header name when toggling auth section", () => {
+      renderSidebar({
+        headerName: "X-API-Key",
+        transportType: "sse",
+      });
+
+      // Open auth section
+      openAuthSection();
+
+      // Verify header name is displayed
+      const headerInput = screen.getByTestId("header-input");
+      expect(headerInput).toHaveValue("X-API-Key");
+
+      // Close auth section
+      const authButton = screen.getByTestId("auth-button");
+      fireEvent.click(authButton);
+
+      // Reopen auth section
+      fireEvent.click(authButton);
+
+      // Verify header name is still preserved
+      expect(screen.getByTestId("header-input")).toHaveValue("X-API-Key");
+    });
+
+    it("should display default header name when not specified", () => {
+      renderSidebar({
+        headerName: undefined,
+        transportType: "sse",
+      });
+
+      openAuthSection();
+
+      const headerInput = screen.getByTestId("header-input");
+      expect(headerInput).toHaveAttribute("placeholder", "Authorization");
+    });
+  });
+
   describe("Key Editing", () => {
     it("should maintain order when editing first key", () => {
       const setEnv = jest.fn();
@@ -343,6 +496,7 @@ describe("Sidebar Environment Variables", () => {
       expect(setConfig).toHaveBeenCalledWith(
         expect.objectContaining({
           MCP_SERVER_REQUEST_TIMEOUT: {
+            label: "Request Timeout",
             description: "Timeout for requests to the MCP server (ms)",
             value: 5000,
           },
@@ -350,6 +504,56 @@ describe("Sidebar Environment Variables", () => {
       );
     });
 
+    it("should update MCP server proxy address", () => {
+      const setConfig = jest.fn();
+      renderSidebar({ config: DEFAULT_INSPECTOR_CONFIG, setConfig });
+
+      openConfigSection();
+
+      const proxyAddressInput = screen.getByTestId(
+        "MCP_PROXY_FULL_ADDRESS-input",
+      );
+      fireEvent.change(proxyAddressInput, {
+        target: { value: "http://localhost:8080" },
+      });
+
+      expect(setConfig).toHaveBeenCalledWith(
+        expect.objectContaining({
+          MCP_PROXY_FULL_ADDRESS: {
+            label: "Inspector Proxy Address",
+            description:
+              "Set this if you are running the MCP Inspector Proxy on a non-default address. Example: http://10.1.1.22:5577",
+            value: "http://localhost:8080",
+          },
+        }),
+      );
+    });
+
+    it("should update max total timeout", () => {
+      const setConfig = jest.fn();
+      renderSidebar({ config: DEFAULT_INSPECTOR_CONFIG, setConfig });
+
+      openConfigSection();
+
+      const maxTotalTimeoutInput = screen.getByTestId(
+        "MCP_REQUEST_MAX_TOTAL_TIMEOUT-input",
+      );
+      fireEvent.change(maxTotalTimeoutInput, {
+        target: { value: "10000" },
+      });
+
+      expect(setConfig).toHaveBeenCalledWith(
+        expect.objectContaining({
+          MCP_REQUEST_MAX_TOTAL_TIMEOUT: {
+            label: "Maximum Total Timeout",
+            description:
+              "Maximum total timeout for requests sent to the MCP server (ms) (Use with progress notifications)",
+            value: 10000,
+          },
+        }),
+      );
+    });
+
     it("should handle invalid timeout values entered by user", () => {
       const setConfig = jest.fn();
       renderSidebar({ config: DEFAULT_INSPECTOR_CONFIG, setConfig });
@@ -364,6 +568,7 @@ describe("Sidebar Environment Variables", () => {
       expect(setConfig).toHaveBeenCalledWith(
         expect.objectContaining({
           MCP_SERVER_REQUEST_TIMEOUT: {
+            label: "Request Timeout",
             description: "Timeout for requests to the MCP server (ms)",
             value: 0,
           },
@@ -409,6 +614,7 @@ describe("Sidebar Environment Variables", () => {
       expect(setConfig).toHaveBeenLastCalledWith(
         expect.objectContaining({
           MCP_SERVER_REQUEST_TIMEOUT: {
+            label: "Request Timeout",
             description: "Timeout for requests to the MCP server (ms)",
             value: 3000,
           },

client/src/components/__tests__/ToolsTab.test.tsx

@@ -1,4 +1,4 @@
-import { render, screen, fireEvent } from "@testing-library/react";
+import { render, screen, fireEvent, act } from "@testing-library/react";
 import { describe, it, expect, jest } from "@jest/globals";
 import "@testing-library/jest-dom";
 import ToolsTab from "../ToolsTab";
@@ -43,7 +43,7 @@ describe("ToolsTab", () => {
     tools: mockTools,
     listTools: jest.fn(),
     clearTools: jest.fn(),
-    callTool: jest.fn(),
+    callTool: jest.fn(async () => {}),
     selectedTool: null,
     setSelectedTool: jest.fn(),
     toolResult: null,
@@ -59,14 +59,16 @@ describe("ToolsTab", () => {
     );
   };
 
-  it("should reset input values when switching tools", () => {
+  it("should reset input values when switching tools", async () => {
     const { rerender } = renderToolsTab({
       selectedTool: mockTools[0],
     });
 
     // Enter a value in the first tool's input
     const input = screen.getByRole("spinbutton") as HTMLInputElement;
-    fireEvent.change(input, { target: { value: "42" } });
+    await act(async () => {
+      fireEvent.change(input, { target: { value: "42" } });
+    });
     expect(input.value).toBe("42");
 
     // Switch to second tool
@@ -80,7 +82,8 @@ describe("ToolsTab", () => {
     const newInput = screen.getByRole("spinbutton") as HTMLInputElement;
     expect(newInput.value).toBe("");
   });
-  it("should handle integer type inputs", () => {
+
+  it("should handle integer type inputs", async () => {
     renderToolsTab({
       selectedTool: mockTools[1], // Use the tool with integer type
     });
@@ -93,10 +96,49 @@ describe("ToolsTab", () => {
     expect(input.value).toBe("42");
 
     const submitButton = screen.getByRole("button", { name: /run tool/i });
-    fireEvent.click(submitButton);
+    await act(async () => {
+      fireEvent.click(submitButton);
+    });
 
     expect(defaultProps.callTool).toHaveBeenCalledWith(mockTools[1].name, {
       count: 42,
     });
   });
+
+  it("should disable button and change text while tool is running", async () => {
+    // Create a promise that we can resolve later
+    let resolvePromise: ((value: unknown) => void) | undefined;
+    const mockPromise = new Promise((resolve) => {
+      resolvePromise = resolve;
+    });
+
+    // Mock callTool to return our promise
+    const mockCallTool = jest.fn().mockReturnValue(mockPromise);
+
+    renderToolsTab({
+      selectedTool: mockTools[0],
+      callTool: mockCallTool,
+    });
+
+    const submitButton = screen.getByRole("button", { name: /run tool/i });
+    expect(submitButton.getAttribute("disabled")).toBeNull();
+
+    // Click the button and verify immediate state changes
+    await act(async () => {
+      fireEvent.click(submitButton);
+    });
+
+    // Verify button is disabled and text changed
+    expect(submitButton.getAttribute("disabled")).not.toBeNull();
+    expect(submitButton.textContent).toBe("Running...");
+
+    // Resolve the promise to simulate tool completion
+    await act(async () => {
+      if (resolvePromise) {
+        await resolvePromise({});
+      }
+    });
+
+    expect(submitButton.getAttribute("disabled")).toBeNull();
+  });
 });

client/src/components/ui/button.tsx

@@ -54,4 +54,4 @@ const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
 );
 Button.displayName = "Button";
 
-export { Button, buttonVariants };
+export { Button };

client/src/components/ui/input.tsx

@@ -2,8 +2,7 @@ import * as React from "react";
 
 import { cn } from "@/lib/utils";
 
-export interface InputProps
-  extends React.InputHTMLAttributes<HTMLInputElement> {}
+export type InputProps = React.InputHTMLAttributes<HTMLInputElement>;
 
 const Input = React.forwardRef<HTMLInputElement, InputProps>(
   ({ className, type, ...props }, ref) => {

client/src/components/ui/textarea.tsx

@@ -2,8 +2,7 @@ import * as React from "react";
 
 import { cn } from "@/lib/utils";
 
-export interface TextareaProps
-  extends React.TextareaHTMLAttributes<HTMLTextAreaElement> {}
+export type TextareaProps = React.TextareaHTMLAttributes<HTMLTextAreaElement>;
 
 const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
   ({ className, ...props }, ref) => {

client/src/hooks/use-toast.ts

@@ -15,13 +15,6 @@ type ToasterToast = ToastProps & {
   action?: ToastActionElement;
 };
 
-const actionTypes = {
-  ADD_TOAST: "ADD_TOAST",
-  UPDATE_TOAST: "UPDATE_TOAST",
-  DISMISS_TOAST: "DISMISS_TOAST",
-  REMOVE_TOAST: "REMOVE_TOAST",
-} as const;
-
 let count = 0;
 
 function genId() {
@@ -29,23 +22,28 @@ function genId() {
   return count.toString();
 }
 
-type ActionType = typeof actionTypes;
+const enum ActionType {
+  ADD_TOAST = "ADD_TOAST",
+  UPDATE_TOAST = "UPDATE_TOAST",
+  DISMISS_TOAST = "DISMISS_TOAST",
+  REMOVE_TOAST = "REMOVE_TOAST",
+}
 
 type Action =
   | {
-      type: ActionType["ADD_TOAST"];
+      type: ActionType.ADD_TOAST;
       toast: ToasterToast;
     }
   | {
-      type: ActionType["UPDATE_TOAST"];
+      type: ActionType.UPDATE_TOAST;
       toast: Partial<ToasterToast>;
     }
   | {
-      type: ActionType["DISMISS_TOAST"];
+      type: ActionType.DISMISS_TOAST;
       toastId?: ToasterToast["id"];
     }
   | {
-      type: ActionType["REMOVE_TOAST"];
+      type: ActionType.REMOVE_TOAST;
       toastId?: ToasterToast["id"];
     };
 
@@ -63,7 +61,7 @@ const addToRemoveQueue = (toastId: string) => {
   const timeout = setTimeout(() => {
     toastTimeouts.delete(toastId);
     dispatch({
-      type: "REMOVE_TOAST",
+      type: ActionType.REMOVE_TOAST,
       toastId: toastId,
     });
   }, TOAST_REMOVE_DELAY);
@@ -73,13 +71,13 @@ const addToRemoveQueue = (toastId: string) => {
 
 export const reducer = (state: State, action: Action): State => {
   switch (action.type) {
-    case "ADD_TOAST":
+    case ActionType.ADD_TOAST:
       return {
         ...state,
         toasts: [action.toast, ...state.toasts].slice(0, TOAST_LIMIT),
       };
 
-    case "UPDATE_TOAST":
+    case ActionType.UPDATE_TOAST:
       return {
         ...state,
         toasts: state.toasts.map((t) =>
@@ -87,7 +85,7 @@ export const reducer = (state: State, action: Action): State => {
         ),
       };
 
-    case "DISMISS_TOAST": {
+    case ActionType.DISMISS_TOAST: {
       const { toastId } = action;
 
       // ! Side effects ! - This could be extracted into a dismissToast() action,
@@ -112,7 +110,7 @@ export const reducer = (state: State, action: Action): State => {
         ),
       };
     }
-    case "REMOVE_TOAST":
+    case ActionType.REMOVE_TOAST:
       if (action.toastId === undefined) {
         return {
           ...state,
@@ -144,13 +142,14 @@ function toast({ ...props }: Toast) {
 
   const update = (props: ToasterToast) =>
     dispatch({
-      type: "UPDATE_TOAST",
+      type: ActionType.UPDATE_TOAST,
       toast: { ...props, id },
     });
-  const dismiss = () => dispatch({ type: "DISMISS_TOAST", toastId: id });
+  const dismiss = () =>
+    dispatch({ type: ActionType.DISMISS_TOAST, toastId: id });
 
   dispatch({
-    type: "ADD_TOAST",
+    type: ActionType.ADD_TOAST,
     toast: {
       ...props,
       id,
@@ -184,7 +183,8 @@ function useToast() {
   return {
     ...state,
     toast,
-    dismiss: (toastId?: string) => dispatch({ type: "DISMISS_TOAST", toastId }),
+    dismiss: (toastId?: string) =>
+      dispatch({ type: ActionType.DISMISS_TOAST, toastId }),
   };
 }
 

client/src/lib/auth.ts

@@ -5,9 +5,14 @@ import {
   OAuthTokens,
   OAuthTokensSchema,
 } from "@modelcontextprotocol/sdk/shared/auth.js";
-import { SESSION_KEYS } from "./constants";
+import { SESSION_KEYS, getServerSpecificKey } from "./constants";
+
+export class InspectorOAuthClientProvider implements OAuthClientProvider {
+  constructor(private serverUrl: string) {
+    // Save the server URL to session storage
+    sessionStorage.setItem(SESSION_KEYS.SERVER_URL, serverUrl);
+  }
 
-class InspectorOAuthClientProvider implements OAuthClientProvider {
   get redirectUrl() {
     return window.location.origin + "/oauth/callback";
   }
@@ -24,7 +29,11 @@ class InspectorOAuthClientProvider implements OAuthClientProvider {
   }
 
   async clientInformation() {
-    const value = sessionStorage.getItem(SESSION_KEYS.CLIENT_INFORMATION);
+    const key = getServerSpecificKey(
+      SESSION_KEYS.CLIENT_INFORMATION,
+      this.serverUrl,
+    );
+    const value = sessionStorage.getItem(key);
     if (!value) {
       return undefined;
     }
@@ -33,14 +42,16 @@ class InspectorOAuthClientProvider implements OAuthClientProvider {
   }
 
   saveClientInformation(clientInformation: OAuthClientInformation) {
-    sessionStorage.setItem(
+    const key = getServerSpecificKey(
       SESSION_KEYS.CLIENT_INFORMATION,
-      JSON.stringify(clientInformation),
+      this.serverUrl,
     );
+    sessionStorage.setItem(key, JSON.stringify(clientInformation));
   }
 
   async tokens() {
-    const tokens = sessionStorage.getItem(SESSION_KEYS.TOKENS);
+    const key = getServerSpecificKey(SESSION_KEYS.TOKENS, this.serverUrl);
+    const tokens = sessionStorage.getItem(key);
     if (!tokens) {
       return undefined;
     }
@@ -49,7 +60,8 @@ class InspectorOAuthClientProvider implements OAuthClientProvider {
   }
 
   saveTokens(tokens: OAuthTokens) {
-    sessionStorage.setItem(SESSION_KEYS.TOKENS, JSON.stringify(tokens));
+    const key = getServerSpecificKey(SESSION_KEYS.TOKENS, this.serverUrl);
+    sessionStorage.setItem(key, JSON.stringify(tokens));
   }
 
   redirectToAuthorization(authorizationUrl: URL) {
@@ -57,11 +69,19 @@ class InspectorOAuthClientProvider implements OAuthClientProvider {
   }
 
   saveCodeVerifier(codeVerifier: string) {
-    sessionStorage.setItem(SESSION_KEYS.CODE_VERIFIER, codeVerifier);
+    const key = getServerSpecificKey(
+      SESSION_KEYS.CODE_VERIFIER,
+      this.serverUrl,
+    );
+    sessionStorage.setItem(key, codeVerifier);
   }
 
   codeVerifier() {
-    const verifier = sessionStorage.getItem(SESSION_KEYS.CODE_VERIFIER);
+    const key = getServerSpecificKey(
+      SESSION_KEYS.CODE_VERIFIER,
+      this.serverUrl,
+    );
+    const verifier = sessionStorage.getItem(key);
     if (!verifier) {
       throw new Error("No code verifier saved for session");
     }
@@ -69,5 +89,3 @@ class InspectorOAuthClientProvider implements OAuthClientProvider {
     return verifier;
   }
 }
-
-export const authProvider = new InspectorOAuthClientProvider();

client/src/lib/configurationTypes.ts

@@ -1,4 +1,5 @@
 export type ConfigItem = {
+  label: string;
   description: string;
   value: string | number | boolean;
 };
@@ -15,5 +16,21 @@ export type InspectorConfig = {
    * Maximum time in milliseconds to wait for a response from the MCP server before timing out.
    */
   MCP_SERVER_REQUEST_TIMEOUT: ConfigItem;
+
+  /**
+   * Whether to reset the timeout on progress notifications. Useful for long-running operations that send periodic progress updates.
+   * Refer: https://spec.modelcontextprotocol.io/specification/2025-03-26/basic/utilities/progress/#progress-flow
+   */
+  MCP_REQUEST_TIMEOUT_RESET_ON_PROGRESS: ConfigItem;
+
+  /**
+   * Maximum total time in milliseconds to wait for a response from the MCP server before timing out. Used in conjunction with MCP_SERVER_REQUEST_TIMEOUT_RESET_ON_PROGRESS.
+   * Refer: https://spec.modelcontextprotocol.io/specification/2025-03-26/basic/utilities/progress/#progress-flow
+   */
+  MCP_REQUEST_MAX_TOTAL_TIMEOUT: ConfigItem;
+
+  /**
+   * The full address of the MCP Proxy Server, in case it is running on a non-default address. Example: http://10.1.1.22:5577
+   */
   MCP_PROXY_FULL_ADDRESS: ConfigItem;
 };

client/src/lib/constants.ts

@@ -8,6 +8,15 @@ export const SESSION_KEYS = {
   CLIENT_INFORMATION: "mcp_client_information",
 } as const;
 
+// Generate server-specific session storage keys
+export const getServerSpecificKey = (
+  baseKey: string,
+  serverUrl?: string,
+): string => {
+  if (!serverUrl) return baseKey;
+  return `[${serverUrl}] ${baseKey}`;
+};
+
 export type ConnectionStatus =
   | "disconnected"
   | "connected"
@@ -22,10 +31,23 @@ export const DEFAULT_MCP_PROXY_LISTEN_PORT = "6277";
  **/
 export const DEFAULT_INSPECTOR_CONFIG: InspectorConfig = {
   MCP_SERVER_REQUEST_TIMEOUT: {
+    label: "Request Timeout",
     description: "Timeout for requests to the MCP server (ms)",
     value: 10000,
   },
+  MCP_REQUEST_TIMEOUT_RESET_ON_PROGRESS: {
+    label: "Reset Timeout on Progress",
+    description: "Reset timeout on progress notifications",
+    value: true,
+  },
+  MCP_REQUEST_MAX_TOTAL_TIMEOUT: {
+    label: "Maximum Total Timeout",
+    description:
+      "Maximum total timeout for requests sent to the MCP server (ms) (Use with progress notifications)",
+    value: 60000,
+  },
   MCP_PROXY_FULL_ADDRESS: {
+    label: "Inspector Proxy Address",
     description:
       "Set this if you are running the MCP Inspector Proxy on a non-default address. Example: http://10.1.1.22:5577",
     value: "",

client/src/lib/hooks/__tests__/useConnection.test.tsx

@@ -0,0 +1,166 @@
+import { renderHook, act } from "@testing-library/react";
+import { useConnection } from "../useConnection";
+import { z } from "zod";
+import { ClientRequest } from "@modelcontextprotocol/sdk/types.js";
+import { DEFAULT_INSPECTOR_CONFIG } from "../../constants";
+
+// Mock fetch
+global.fetch = jest.fn().mockResolvedValue({
+  json: () => Promise.resolve({ status: "ok" }),
+});
+
+// Mock the SDK dependencies
+const mockRequest = jest.fn().mockResolvedValue({ test: "response" });
+const mockClient = {
+  request: mockRequest,
+  notification: jest.fn(),
+  connect: jest.fn().mockResolvedValue(undefined),
+  close: jest.fn(),
+  getServerCapabilities: jest.fn(),
+  getServerVersion: jest.fn(),
+  getInstructions: jest.fn(),
+  setNotificationHandler: jest.fn(),
+  setRequestHandler: jest.fn(),
+};
+
+jest.mock("@modelcontextprotocol/sdk/client/index.js", () => ({
+  Client: jest.fn().mockImplementation(() => mockClient),
+}));
+
+jest.mock("@modelcontextprotocol/sdk/client/sse.js", () => ({
+  SSEClientTransport: jest.fn(),
+  SseError: jest.fn(),
+}));
+
+jest.mock("@modelcontextprotocol/sdk/client/auth.js", () => ({
+  auth: jest.fn().mockResolvedValue("AUTHORIZED"),
+}));
+
+// Mock the toast hook
+jest.mock("@/hooks/use-toast", () => ({
+  useToast: () => ({
+    toast: jest.fn(),
+  }),
+}));
+
+// Mock the auth provider
+jest.mock("../../auth", () => ({
+  InspectorOAuthClientProvider: jest.fn().mockImplementation(() => ({
+    tokens: jest.fn().mockResolvedValue({ access_token: "mock-token" }),
+  })),
+}));
+
+describe("useConnection", () => {
+  const defaultProps = {
+    transportType: "sse" as const,
+    command: "",
+    args: "",
+    sseUrl: "http://localhost:8080",
+    env: {},
+    config: DEFAULT_INSPECTOR_CONFIG,
+  };
+
+  describe("Request Configuration", () => {
+    beforeEach(() => {
+      jest.clearAllMocks();
+    });
+
+    test("uses the default config values in makeRequest", async () => {
+      const { result } = renderHook(() => useConnection(defaultProps));
+
+      // Connect the client
+      await act(async () => {
+        await result.current.connect();
+      });
+
+      // Wait for state update
+      await act(async () => {
+        await new Promise((resolve) => setTimeout(resolve, 0));
+      });
+
+      const mockRequest: ClientRequest = {
+        method: "ping",
+        params: {},
+      };
+
+      const mockSchema = z.object({
+        test: z.string(),
+      });
+
+      await act(async () => {
+        await result.current.makeRequest(mockRequest, mockSchema);
+      });
+
+      expect(mockClient.request).toHaveBeenCalledWith(
+        mockRequest,
+        mockSchema,
+        expect.objectContaining({
+          timeout: DEFAULT_INSPECTOR_CONFIG.MCP_SERVER_REQUEST_TIMEOUT.value,
+          maxTotalTimeout:
+            DEFAULT_INSPECTOR_CONFIG.MCP_REQUEST_MAX_TOTAL_TIMEOUT.value,
+          resetTimeoutOnProgress:
+            DEFAULT_INSPECTOR_CONFIG.MCP_REQUEST_TIMEOUT_RESET_ON_PROGRESS
+              .value,
+        }),
+      );
+    });
+
+    test("overrides the default config values when passed in options in makeRequest", async () => {
+      const { result } = renderHook(() => useConnection(defaultProps));
+
+      // Connect the client
+      await act(async () => {
+        await result.current.connect();
+      });
+
+      // Wait for state update
+      await act(async () => {
+        await new Promise((resolve) => setTimeout(resolve, 0));
+      });
+
+      const mockRequest: ClientRequest = {
+        method: "ping",
+        params: {},
+      };
+
+      const mockSchema = z.object({
+        test: z.string(),
+      });
+
+      await act(async () => {
+        await result.current.makeRequest(mockRequest, mockSchema, {
+          timeout: 1000,
+          maxTotalTimeout: 2000,
+          resetTimeoutOnProgress: false,
+        });
+      });
+
+      expect(mockClient.request).toHaveBeenCalledWith(
+        mockRequest,
+        mockSchema,
+        expect.objectContaining({
+          timeout: 1000,
+          maxTotalTimeout: 2000,
+          resetTimeoutOnProgress: false,
+        }),
+      );
+    });
+  });
+
+  test("throws error when mcpClient is not connected", async () => {
+    const { result } = renderHook(() => useConnection(defaultProps));
+
+    const mockRequest: ClientRequest = {
+      method: "ping",
+      params: {},
+    };
+
+    const mockSchema = z.object({
+      test: z.string(),
+    });
+
+    await expect(
+      result.current.makeRequest(mockRequest, mockSchema),
+    ).rejects.toThrow("MCP client not connected");
+  });
+});

client/src/lib/hooks/useCompletionState.ts

@@ -1,4 +1,4 @@
-import { useState, useCallback, useEffect, useRef } from "react";
+import { useState, useCallback, useEffect, useRef, useMemo } from "react";
 import {
   ResourceReference,
   PromptReference,
@@ -15,9 +15,11 @@ function debounce<T extends (...args: any[]) => PromiseLike<void>>(
   wait: number,
 ): (...args: Parameters<T>) => void {
   let timeout: ReturnType<typeof setTimeout>;
-  return function (...args: Parameters<T>) {
+  return (...args: Parameters<T>) => {
     clearTimeout(timeout);
-    timeout = setTimeout(() => func(...args), wait);
+    timeout = setTimeout(() => {
+      void func(...args);
+    }, wait);
   };
 }
 
@@ -58,8 +60,8 @@ export function useCompletionState(
     });
   }, [cleanup]);
 
-  const requestCompletions = useCallback(
-    debounce(
+  const requestCompletions = useMemo(() => {
+    return debounce(
       async (
         ref: ResourceReference | PromptReference,
         argName: string,
@@ -94,7 +96,7 @@ export function useCompletionState(
               loading: { ...prev.loading, [argName]: false },
             }));
           }
-        } catch (err) {
+        } catch {
           if (!abortController.signal.aborted) {
             setState((prev) => ({
               ...prev,
@@ -108,9 +110,8 @@ export function useCompletionState(
         }
       },
       debounceMs,
-    ),
-    [handleCompletion, completionsSupported, cleanup, debounceMs],
-  );
+    );
+  }, [handleCompletion, completionsSupported, cleanup, debounceMs]);
 
   // Clear completions when support status changes
   useEffect(() => {

client/src/lib/hooks/useConnection.ts

@@ -8,7 +8,6 @@ import {
   ClientRequest,
   CreateMessageRequestSchema,
   ListRootsRequestSchema,
-  ProgressNotificationSchema,
   ResourceUpdatedNotificationSchema,
   LoggingMessageNotificationSchema,
   Request,
@@ -23,15 +22,24 @@ import {
   ResourceListChangedNotificationSchema,
   ToolListChangedNotificationSchema,
   PromptListChangedNotificationSchema,
+  Progress,
 } from "@modelcontextprotocol/sdk/types.js";
+import { RequestOptions } from "@modelcontextprotocol/sdk/shared/protocol.js";
 import { useState } from "react";
 import { useToast } from "@/hooks/use-toast";
 import { z } from "zod";
-import { ConnectionStatus, SESSION_KEYS } from "../constants";
+import { ConnectionStatus } from "../constants";
 import { Notification, StdErrNotificationSchema } from "../notificationTypes";
 import { auth } from "@modelcontextprotocol/sdk/client/auth.js";
-import { authProvider } from "../auth";
+import { InspectorOAuthClientProvider } from "../auth";
 import packageJson from "../../../package.json";
+import {
+  getMCPProxyAddress,
+  getMCPServerRequestMaxTotalTimeout,
+  resetRequestTimeoutOnProgress,
+} from "@/utils/configUtils";
+import { getMCPServerRequestTimeout } from "@/utils/configUtils";
+import { InspectorConfig } from "../configurationTypes";
 
 interface UseConnectionOptions {
   transportType: "stdio" | "sse";
@@ -39,9 +47,9 @@ interface UseConnectionOptions {
   args: string;
   sseUrl: string;
   env: Record<string, string>;
-  proxyServerUrl: string;
   bearerToken?: string;
-  requestTimeout?: number;
+  headerName?: string;
+  config: InspectorConfig;
   onNotification?: (notification: Notification) => void;
   onStdErrNotification?: (notification: Notification) => void;
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -50,21 +58,15 @@ interface UseConnectionOptions {
   getRoots?: () => any[];
 }
 
-interface RequestOptions {
-  signal?: AbortSignal;
-  timeout?: number;
-  suppressToast?: boolean;
-}
-
 export function useConnection({
   transportType,
   command,
   args,
   sseUrl,
   env,
-  proxyServerUrl,
   bearerToken,
-  requestTimeout,
+  headerName,
+  config,
   onNotification,
   onStdErrNotification,
   onPendingRequest,
@@ -94,31 +96,50 @@ export function useConnection({
   const makeRequest = async <T extends z.ZodType>(
     request: ClientRequest,
     schema: T,
-    options?: RequestOptions,
+    options?: RequestOptions & { suppressToast?: boolean },
   ): Promise<z.output<T>> => {
     if (!mcpClient) {
       throw new Error("MCP client not connected");
     }
-
     try {
       const abortController = new AbortController();
-      const timeoutId = setTimeout(() => {
-        abortController.abort("Request timed out");
-      }, options?.timeout ?? requestTimeout);
+
+      // prepare MCP Client request options
+      const mcpRequestOptions: RequestOptions = {
+        signal: options?.signal ?? abortController.signal,
+        resetTimeoutOnProgress:
+          options?.resetTimeoutOnProgress ??
+          resetRequestTimeoutOnProgress(config),
+        timeout: options?.timeout ?? getMCPServerRequestTimeout(config),
+        maxTotalTimeout:
+          options?.maxTotalTimeout ??
+          getMCPServerRequestMaxTotalTimeout(config),
+      };
+
+      // If progress notifications are enabled, add an onprogress hook to the MCP Client request options
+      // This is required by SDK to reset the timeout on progress notifications
+      if (mcpRequestOptions.resetTimeoutOnProgress) {
+        mcpRequestOptions.onprogress = (params: Progress) => {
+          // Add progress notification to `Server Notification` window in the UI
+          if (onNotification) {
+            onNotification({
+              method: "notification/progress",
+              params,
+            });
+          }
+        };
+      }
 
       let response;
       try {
-        response = await mcpClient.request(request, schema, {
-          signal: options?.signal ?? abortController.signal,
-        });
+        response = await mcpClient.request(request, schema, mcpRequestOptions);
+
         pushHistory(request, response);
       } catch (error) {
         const errorMessage =
           error instanceof Error ? error.message : String(error);
         pushHistory(request, { error: errorMessage });
         throw error;
-      } finally {
-        clearTimeout(timeoutId);
       }
 
       return response;
@@ -211,7 +232,7 @@ export function useConnection({
 
   const checkProxyHealth = async () => {
     try {
-      const proxyHealthUrl = new URL(`${proxyServerUrl}/health`);
+      const proxyHealthUrl = new URL(`${getMCPProxyAddress(config)}/health`);
       const proxyHealthResponse = await fetch(proxyHealthUrl);
       const proxyHealth = await proxyHealthResponse.json();
       if (proxyHealth?.status !== "ok") {
@@ -225,9 +246,10 @@ export function useConnection({
 
   const handleAuthError = async (error: unknown) => {
     if (error instanceof SseError && error.code === 401) {
-      sessionStorage.setItem(SESSION_KEYS.SERVER_URL, sseUrl);
+      // Create a new auth provider with the current server URL
+      const serverAuthProvider = new InspectorOAuthClientProvider(sseUrl);
 
-      const result = await auth(authProvider, { serverUrl: sseUrl });
+      const result = await auth(serverAuthProvider, { serverUrl: sseUrl });
       return result === "AUTHORIZED";
     }
 
@@ -256,7 +278,7 @@ export function useConnection({
       setConnectionStatus("error-connecting-to-proxy");
       return;
     }
-    const mcpProxyServerUrl = new URL(`${proxyServerUrl}/sse`);
+    const mcpProxyServerUrl = new URL(`${getMCPProxyAddress(config)}/sse`);
     mcpProxyServerUrl.searchParams.append("transportType", transportType);
     if (transportType === "stdio") {
       mcpProxyServerUrl.searchParams.append("command", command);
@@ -271,10 +293,15 @@ export function useConnection({
       // proxying through the inspector server first.
       const headers: HeadersInit = {};
 
+      // Create an auth provider with the current server URL
+      const serverAuthProvider = new InspectorOAuthClientProvider(sseUrl);
+
       // Use manually provided bearer token if available, otherwise use OAuth tokens
-      const token = bearerToken || (await authProvider.tokens())?.access_token;
+      const token =
+        bearerToken || (await serverAuthProvider.tokens())?.access_token;
       if (token) {
-        headers["Authorization"] = `Bearer ${token}`;
+        const authHeaderName = headerName || "Authorization";
+        headers[authHeaderName] = `Bearer ${token}`;
       }
 
       const clientTransport = new SSEClientTransport(mcpProxyServerUrl, {
@@ -289,7 +316,6 @@ export function useConnection({
       if (onNotification) {
         [
           CancelledNotificationSchema,
-          ProgressNotificationSchema,
           LoggingMessageNotificationSchema,
           ResourceUpdatedNotificationSchema,
           ResourceListChangedNotificationSchema,
@@ -314,8 +340,19 @@ export function useConnection({
         );
       }
 
+      let capabilities;
       try {
         await client.connect(clientTransport);
+
+        capabilities = client.getServerCapabilities();
+        const initializeRequest = {
+          method: "initialize",
+        };
+        pushHistory(initializeRequest, {
+          capabilities,
+          serverInfo: client.getServerVersion(),
+          instructions: client.getInstructions(),
+        });
       } catch (error) {
         console.error(
           `Failed to connect to MCP Server via the MCP Inspector Proxy: ${mcpProxyServerUrl}:`,
@@ -332,8 +369,6 @@ export function useConnection({
         }
         throw error;
       }
-
-      const capabilities = client.getServerCapabilities();
       setServerCapabilities(capabilities ?? null);
       setCompletionsSupported(true); // Reset completions support on new connection
 

client/src/lib/useTheme.ts

@@ -43,7 +43,10 @@ const useTheme = (): [Theme, (mode: Theme) => void] => {
       document.documentElement.classList.toggle("dark", newTheme === "dark");
     }
   }, []);
-  return useMemo(() => [theme, setThemeWithSideEffect], [theme]);
+  return useMemo(
+    () => [theme, setThemeWithSideEffect],
+    [theme, setThemeWithSideEffect],
+  );
 };
 
 export default useTheme;

client/src/utils/__tests__/jsonUtils.test.ts

@@ -1,5 +1,146 @@
-import { updateValueAtPath, getValueAtPath } from "../jsonPathUtils";
-import { JsonValue } from "../../components/DynamicJsonForm";
+import {
+  getDataType,
+  tryParseJson,
+  updateValueAtPath,
+  getValueAtPath,
+} from "../jsonUtils";
+import type { JsonValue } from "../jsonUtils";
+
+describe("getDataType", () => {
+  test("should return 'string' for string values", () => {
+    expect(getDataType("hello")).toBe("string");
+    expect(getDataType("")).toBe("string");
+  });
+
+  test("should return 'number' for number values", () => {
+    expect(getDataType(123)).toBe("number");
+    expect(getDataType(0)).toBe("number");
+    expect(getDataType(-10)).toBe("number");
+    expect(getDataType(1.5)).toBe("number");
+    expect(getDataType(NaN)).toBe("number");
+    expect(getDataType(Infinity)).toBe("number");
+  });
+
+  test("should return 'boolean' for boolean values", () => {
+    expect(getDataType(true)).toBe("boolean");
+    expect(getDataType(false)).toBe("boolean");
+  });
+
+  test("should return 'undefined' for undefined value", () => {
+    expect(getDataType(undefined)).toBe("undefined");
+  });
+
+  test("should return 'object' for object values", () => {
+    expect(getDataType({})).toBe("object");
+    expect(getDataType({ key: "value" })).toBe("object");
+  });
+
+  test("should return 'array' for array values", () => {
+    expect(getDataType([])).toBe("array");
+    expect(getDataType([1, 2, 3])).toBe("array");
+    expect(getDataType(["a", "b", "c"])).toBe("array");
+    expect(getDataType([{}, { nested: true }])).toBe("array");
+  });
+
+  test("should return 'null' for null value", () => {
+    expect(getDataType(null)).toBe("null");
+  });
+});
+
+describe("tryParseJson", () => {
+  test("should correctly parse valid JSON object", () => {
+    const jsonString = '{"name":"test","value":123}';
+    const result = tryParseJson(jsonString);
+
+    expect(result.success).toBe(true);
+    expect(result.data).toEqual({ name: "test", value: 123 });
+  });
+
+  test("should correctly parse valid JSON array", () => {
+    const jsonString = '[1,2,3,"test"]';
+    const result = tryParseJson(jsonString);
+
+    expect(result.success).toBe(true);
+    expect(result.data).toEqual([1, 2, 3, "test"]);
+  });
+
+  test("should correctly parse JSON with whitespace", () => {
+    const jsonString = '  {  "name"  :  "test"  }  ';
+    const result = tryParseJson(jsonString);
+
+    expect(result.success).toBe(true);
+    expect(result.data).toEqual({ name: "test" });
+  });
+
+  test("should correctly parse nested JSON structures", () => {
+    const jsonString =
+      '{"user":{"name":"test","details":{"age":30}},"items":[1,2,3]}';
+    const result = tryParseJson(jsonString);
+
+    expect(result.success).toBe(true);
+    expect(result.data).toEqual({
+      user: {
+        name: "test",
+        details: {
+          age: 30,
+        },
+      },
+      items: [1, 2, 3],
+    });
+  });
+
+  test("should correctly parse empty objects and arrays", () => {
+    expect(tryParseJson("{}").success).toBe(true);
+    expect(tryParseJson("{}").data).toEqual({});
+
+    expect(tryParseJson("[]").success).toBe(true);
+    expect(tryParseJson("[]").data).toEqual([]);
+  });
+
+  test("should return failure for non-JSON strings", () => {
+    const nonJsonString = "this is not json";
+    const result = tryParseJson(nonJsonString);
+
+    expect(result.success).toBe(false);
+    expect(result.data).toBe(nonJsonString);
+  });
+
+  test("should return failure for malformed JSON", () => {
+    const malformedJson = '{"name":"test",}';
+    const result = tryParseJson(malformedJson);
+
+    expect(result.success).toBe(false);
+    expect(result.data).toBe(malformedJson);
+  });
+
+  test("should return failure for strings with correct delimiters but invalid JSON", () => {
+    const invalidJson = "{name:test}";
+    const result = tryParseJson(invalidJson);
+
+    expect(result.success).toBe(false);
+    expect(result.data).toBe(invalidJson);
+  });
+
+  test("should handle edge cases", () => {
+    expect(tryParseJson("").success).toBe(false);
+    expect(tryParseJson("").data).toBe("");
+
+    expect(tryParseJson("   ").success).toBe(false);
+    expect(tryParseJson("   ").data).toBe("   ");
+
+    expect(tryParseJson("null").success).toBe(false);
+    expect(tryParseJson("null").data).toBe("null");
+
+    expect(tryParseJson('"string"').success).toBe(false);
+    expect(tryParseJson('"string"').data).toBe('"string"');
+
+    expect(tryParseJson("123").success).toBe(false);
+    expect(tryParseJson("123").data).toBe("123");
+
+    expect(tryParseJson("true").success).toBe(false);
+    expect(tryParseJson("true").data).toBe("true");
+  });
+});
 
 describe("updateValueAtPath", () => {
   // Basic functionality tests
@@ -8,17 +149,17 @@ describe("updateValueAtPath", () => {
   });
 
   test("initializes an empty object when input is null/undefined and path starts with a string", () => {
-    expect(updateValueAtPath(null as any, ["foo"], "bar")).toEqual({
+    expect(updateValueAtPath(null, ["foo"], "bar")).toEqual({
       foo: "bar",
     });
-    expect(updateValueAtPath(undefined as any, ["foo"], "bar")).toEqual({
+    expect(updateValueAtPath(undefined, ["foo"], "bar")).toEqual({
       foo: "bar",
     });
   });
 
   test("initializes an empty array when input is null/undefined and path starts with a number", () => {
-    expect(updateValueAtPath(null as any, ["0"], "bar")).toEqual(["bar"]);
-    expect(updateValueAtPath(undefined as any, ["0"], "bar")).toEqual(["bar"]);
+    expect(updateValueAtPath(null, ["0"], "bar")).toEqual(["bar"]);
+    expect(updateValueAtPath(undefined, ["0"], "bar")).toEqual(["bar"]);
   });
 
   // Object update tests
@@ -152,10 +293,8 @@ describe("getValueAtPath", () => {
   });
 
   test("returns default value when input is null/undefined", () => {
-    expect(getValueAtPath(null as any, ["foo"], "default")).toBe("default");
-    expect(getValueAtPath(undefined as any, ["foo"], "default")).toBe(
-      "default",
-    );
+    expect(getValueAtPath(null, ["foo"], "default")).toBe("default");
+    expect(getValueAtPath(undefined, ["foo"], "default")).toBe("default");
   });
 
   test("handles array indices correctly", () => {

client/src/utils/__tests__/schemaUtils.test.ts

@@ -1,5 +1,5 @@
 import { generateDefaultValue, formatFieldLabel } from "../schemaUtils";
-import { JsonSchemaType } from "../../components/DynamicJsonForm";
+import type { JsonSchemaType } from "../jsonUtils";
 
 describe("generateDefaultValue", () => {
   test("generates default string", () => {

client/src/utils/configUtils.ts

@@ -12,3 +12,15 @@ export const getMCPProxyAddress = (config: InspectorConfig): string => {
 export const getMCPServerRequestTimeout = (config: InspectorConfig): number => {
   return config.MCP_SERVER_REQUEST_TIMEOUT.value as number;
 };
+
+export const resetRequestTimeoutOnProgress = (
+  config: InspectorConfig,
+): boolean => {
+  return config.MCP_REQUEST_TIMEOUT_RESET_ON_PROGRESS.value as boolean;
+};
+
+export const getMCPServerRequestMaxTotalTimeout = (
+  config: InspectorConfig,
+): number => {
+  return config.MCP_REQUEST_MAX_TOTAL_TIMEOUT.value as number;
+};

client/src/utils/jsonUtils.ts

@@ -1,7 +1,66 @@
-import { JsonValue } from "../components/DynamicJsonForm";
+export type JsonValue =
+  | string
+  | number
+  | boolean
+  | null
+  | undefined
+  | JsonValue[]
+  | { [key: string]: JsonValue };
+
+export type JsonSchemaType = {
+  type:
+    | "string"
+    | "number"
+    | "integer"
+    | "boolean"
+    | "array"
+    | "object"
+    | "null";
+  description?: string;
+  required?: boolean;
+  default?: JsonValue;
+  properties?: Record<string, JsonSchemaType>;
+  items?: JsonSchemaType;
+};
 
 export type JsonObject = { [key: string]: JsonValue };
 
+export type DataType =
+  | "string"
+  | "number"
+  | "bigint"
+  | "boolean"
+  | "symbol"
+  | "undefined"
+  | "object"
+  | "function"
+  | "array"
+  | "null";
+
+export function getDataType(value: JsonValue): DataType {
+  if (Array.isArray(value)) return "array";
+  if (value === null) return "null";
+  return typeof value;
+}
+
+export function tryParseJson(str: string): {
+  success: boolean;
+  data: JsonValue;
+} {
+  const trimmed = str.trim();
+  if (
+    !(trimmed.startsWith("{") && trimmed.endsWith("}")) &&
+    !(trimmed.startsWith("[") && trimmed.endsWith("]"))
+  ) {
+    return { success: false, data: str };
+  }
+  try {
+    return { success: true, data: JSON.parse(str) };
+  } catch {
+    return { success: false, data: str };
+  }
+}
+
 /**
  * Updates a value at a specific path in a nested JSON structure
  * @param obj The original JSON value

client/src/utils/schemaUtils.ts

@@ -1,5 +1,4 @@
-import { JsonValue, JsonSchemaType } from "../components/DynamicJsonForm";
-import { JsonObject } from "./jsonPathUtils";
+import type { JsonValue, JsonSchemaType, JsonObject } from "./jsonUtils";
 
 /**
  * Generates a default value based on a JSON schema type