Fix example servers SSE invocation

Reported-by: Simon Willison

examples/servers/simple-resource/mcp_simple_resource/server.py

@@ -4,6 +4,13 @@ import mcp.types as types
 from mcp.server import AnyUrl, Server
 
 
+SAMPLE_RESOURCES = {
+    "greeting": "Hello! This is a sample text resource.",
+    "help": "This server provides a few sample text resources for testing.",
+    "about": "This is the simple-resource MCP server implementation.",
+}
+
+
 @click.group()
 def cli():
     pass
@@ -18,17 +25,6 @@ def cli():
     help="Transport type",
 )
 def main(port: int, transport: str) -> int:
-    return anyio.run(_amain, port, transport)
-
-
-SAMPLE_RESOURCES = {
-    "greeting": "Hello! This is a sample text resource.",
-    "help": "This server provides a few sample text resources for testing.",
-    "about": "This is the simple-resource MCP server implementation.",
-}
-
-
-async def _amain(port: int, transport: str) -> int:
     app = Server("mcp-simple-resource")
 
     @app.list_resources()
@@ -60,14 +56,16 @@ async def _amain(port: int, transport: str) -> int:
 
         sse = SseServerTransport("/messages")
 
-        async def handle_sse(scope, receive, send):
-            async with sse.connect_sse(scope, receive, send) as streams:
+        async def handle_sse(request):
+            async with sse.connect_sse(
+                request.scope, request.receive, request._send
+            ) as streams:
                 await app.run(
                     streams[0], streams[1], app.create_initialization_options()
                 )
 
-        async def handle_messages(scope, receive, send):
-            await sse.handle_post_message(scope, receive, send)
+        async def handle_messages(request):
+            await sse.handle_post_message(request.scope, request.receive, request._send)
 
         starlette_app = Starlette(
             debug=True,
@@ -83,7 +81,12 @@ async def _amain(port: int, transport: str) -> int:
     else:
         from mcp.server.stdio import stdio_server
 
-        async with stdio_server() as streams:
-            await app.run(streams[0], streams[1], app.create_initialization_options())
+        async def arun():
+            async with stdio_server() as streams:
+                await app.run(
+                    streams[0], streams[1], app.create_initialization_options()
+                )
+
+        anyio.run(arun)
 
     return 0