From 22e3fcba54c2409a46e04ba81bd6885cbfc0442a Mon Sep 17 00:00:00 2001
From: yassin <yassin@berri.ai>
Date: Wed, 2 Sep 2026 16:05:37 +0000
Subject: [PATCH] fix(mcp): restore unrelated exception formatting

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---
 litellm/proxy/management_endpoints/mcp_management_endpoints.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/litellm/proxy/management_endpoints/mcp_management_endpoints.py b/litellm/proxy/management_endpoints/mcp_management_endpoints.py
index 109030a2df5..fd6294fd77e 100644
--- a/litellm/proxy/management_endpoints/mcp_management_endpoints.py
+++ b/litellm/proxy/management_endpoints/mcp_management_endpoints.py
@@ -259,7 +259,7 @@ if MCP_AVAILABLE:
         if normalize_upstream_header_name(raw) is None:
             raise HTTPException(
                 status_code=status.HTTP_400_BAD_REQUEST,
-                detail={  # mutable-ok: FastAPI exception detail requires a JSON-serializable dictionary
+                detail={
                     "error": (
                         f"Invalid upstream_token_header {raw!r}: must be a valid HTTP header name "
                         "(RFC 7230 token, e.g. 'esb-oauth')"