From 95930956f4124162d91cf73cdda6fa154cc1b3c3 Mon Sep 17 00:00:00 2001
From: Jeremiah Lowin <153965+jlowin@users.noreply.github.com>
Date: Wed, 7 May 2025 10:01:06 -0400
Subject: [PATCH] Ensure a response is returned from sse endpoint

---
 src/fastmcp/server/server.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/fastmcp/server/server.py b/src/fastmcp/server/server.py
index 2c09da879..04cbbe4f4 100644
--- a/src/fastmcp/server/server.py
+++ b/src/fastmcp/server/server.py
@@ -817,9 +817,9 @@ class FastMCP(Generic[LifespanResultT]):
         else:
             # Auth is disabled, no need for RequireAuthMiddleware
             # Since handle_sse is an ASGI app, we need to create a compatible endpoint
-            async def sse_endpoint(request: Request) -> None:
+            async def sse_endpoint(request: Request) -> Response:
                 # Convert the Starlette request to ASGI parameters
-                await handle_sse(request.scope, request.receive, request._send)  # type: ignore[reportPrivateUsage]
+                return await handle_sse(request.scope, request.receive, request._send)  # type: ignore[reportPrivateUsage]
 
             routes.append(
                 Route(