feat: add version string parameter to 'create_initialization_options'

README.md

@@ -135,14 +135,7 @@ async def run():
         await server.run(
             read_stream,
             write_stream,
-            InitializationOptions(
-                server_name="example",
-                server_version="0.1.0",
-                capabilities=server.get_capabilities(
-                    notification_options=NotificationOptions(),
-                    experimental_capabilities={},
-                )
-            )
+            server.create_initialization_options("0.1.0")
         )
 
 if __name__ == "__main__":

src/mcp/server/__init__.py

@@ -114,6 +114,7 @@ class Server:
 
     def create_initialization_options(
         self,
+        version: str | None = None,
         notification_options: NotificationOptions | None = None,
         experimental_capabilities: dict[str, dict[str, Any]] | None = None,
     ) -> InitializationOptions:
@@ -133,7 +134,7 @@ class Server:
 
         return InitializationOptions(
             server_name=self.name,
-            server_version=pkg_version("mcp"),
+            server_version=version if version else pkg_version("mcp"),
             capabilities=self.get_capabilities(
                 notification_options or NotificationOptions(),
                 experimental_capabilities or {},

src/mcp/server/sse.py

@@ -19,8 +19,9 @@ Example usage:
         async with sse.connect_sse(
             request.scope, request.receive, request._send
         ) as streams:
+            # Pass user visible version string, egs. 0.1.0
             await app.run(
-                streams[0], streams[1], app.create_initialization_options()
+                streams[0], streams[1], app.create_initialization_options("0.1.0")
             )
 
     async def handle_messages(request):