From e1886a8229d4f6144f42596e2e178d8f7a348dcd Mon Sep 17 00:00:00 2001
From: thinhtpt-dev <thinh.tran@katalon.com>
Date: Tue, 6 Jan 2026 14:00:13 +0700
Subject: [PATCH] fix: detect 401 errors from `StreamableHTTP` transport in
 client

---
 client/src/lib/hooks/useConnection.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/client/src/lib/hooks/useConnection.ts b/client/src/lib/hooks/useConnection.ts
index eb782041..4a584336 100644
--- a/client/src/lib/hooks/useConnection.ts
+++ b/client/src/lib/hooks/useConnection.ts
@@ -7,6 +7,7 @@ import {
 import {
   StreamableHTTPClientTransport,
   StreamableHTTPClientTransportOptions,
+  StreamableHTTPError,
 } from "@modelcontextprotocol/sdk/client/streamableHttp.js";
 import {
   ClientNotification,
@@ -358,6 +359,7 @@ export function useConnection({
   const is401Error = (error: unknown): boolean => {
     return (
       (error instanceof SseError && error.code === 401) ||
+      (error instanceof StreamableHTTPError && error.code === 401) ||
       (error instanceof Error && error.message.includes("401")) ||
       (error instanceof Error && error.message.includes("Unauthorized"))
     );