Initial commit of n8n MCP Server

A Model Context Protocol (MCP) server that integrates with n8n, providing tools for workflow and execution management via the n8n API.

src/tools/execution/handler.ts

@@ -0,0 +1,60 @@
+/**
+ * Execution Tools Handler
+ * 
+ * This module handles calls to execution-related tools.
+ */
+
+import { ToolCallResult } from '../../types/index.js';
+import { McpError } from '@modelcontextprotocol/sdk/types.js';
+import { ErrorCode } from '../../errors/error-codes.js';
+import { N8nApiError, getErrorMessage } from '../../errors/index.js';
+import { 
+  ListExecutionsHandler, 
+  GetExecutionHandler,
+  DeleteExecutionHandler
+} from './index.js';
+
+/**
+ * Handle execution tool calls
+ * 
+ * @param toolName Name of the tool being called
+ * @param args Arguments passed to the tool
+ * @returns Tool call result
+ */
+export default async function executionHandler(
+  toolName: string,
+  args: Record<string, any>
+): Promise<ToolCallResult> {
+  try {
+    // Route to the appropriate handler based on tool name
+    switch (toolName) {
+      case 'list_executions':
+        return await new ListExecutionsHandler().execute(args);
+        
+      case 'get_execution':
+        return await new GetExecutionHandler().execute(args);
+        
+      case 'delete_execution':
+        return await new DeleteExecutionHandler().execute(args);
+        
+      default:
+        throw new McpError(
+          ErrorCode.NotImplemented,
+          `Unknown execution tool: '${toolName}'`
+        );
+    }
+  } catch (error) {
+    // Get appropriate error message
+    const errorMessage = getErrorMessage(error);
+    
+    return {
+      content: [
+        {
+          type: 'text',
+          text: `Error executing execution tool: ${errorMessage}`,
+        },
+      ],
+      isError: true,
+    };
+  }
+}