From 1ec4e3b556e4fc8d426d5b4ca51d4d936719b752 Mon Sep 17 00:00:00 2001
From: Shiv Deepak Muddada <shivdeepak@gmail.com>
Date: Wed, 23 Apr 2025 01:43:49 -0700
Subject: [PATCH] fix cors issue with accessing mcp-session-id header

---
 server/src/index.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/server/src/index.ts b/server/src/index.ts
index b294cfe..ed79ae9 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -39,6 +39,10 @@ const { values } = parseArgs({
 
 const app = express();
 app.use(cors());
+app.use((req, res, next) => {
+  res.header("Access-Control-Expose-Headers", "mcp-session-id");
+  next();
+});
 
 const webAppTransports: Map<string, Transport> = new Map<string, Transport>(); // Transports by sessionId