From 9f4a8006d74441040617a42ac65b82a5b04d98f1 Mon Sep 17 00:00:00 2001
From: Lee Hubbard <hubbard.zlee@unknowncyber.com>
Date: Thu, 5 Feb 2026 12:22:14 -0600
Subject: [PATCH] fix: pass related_request_id in report_progress for SSE
 streaming

Progress notifications were not being delivered to clients because
related_request_id was not passed to send_progress_notification(),
causing the SSE transport to drop the notification.
---
 src/mcp/server/mcpserver/server.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mcp/server/mcpserver/server.py b/src/mcp/server/mcpserver/server.py
index 8c1fc342b..9806aa0f8 100644
--- a/src/mcp/server/mcpserver/server.py
+++ b/src/mcp/server/mcpserver/server.py
@@ -1052,6 +1052,7 @@ async def report_progress(self, progress: float, total: float | None = None, mes
             progress=progress,
             total=total,
             message=message,
+            related_request_id=self.request_id,
         )
 
     async def read_resource(self, uri: str | AnyUrl) -> Iterable[ReadResourceContents]: