chore: publish from main

2026-10-13 15:24:25 +00:00 · 2026-10-09 01:00:54 +00:00
parent 163686213a
commit 8eb22837cd
13 changed files with 652 additions and 417 deletions
@@ -0,0 +1,46 @@
+# Streamable HTTP Servers
+
+Use this transport only for a remote server. A local server uses stdio.
+
+## Run the server
+
+Replace `mcp.run()` in `server.py`:
+
+```python
+import os
+
+if __name__ == "__main__":
+    mcp.run(
+        transport="streamable-http",
+        host=os.environ.get("HOST", "127.0.0.1"),
+        port=int(os.environ.get("PORT", "8000")),
+    )
+```
+
+Clients connect to `http://HOST:PORT/mcp`. For VS Code, write `.vscode/mcp.json`:
+
+```json
+{
+  "servers": {
+    "demo": {
+      "type": "http",
+      "url": "http://localhost:8000/mcp"
+    }
+  }
+}
+```
+
+## Mount the server in an ASGI app
+
+1. Use `mcp.streamable_http_app()` to mount the server in a Starlette or FastAPI app.
+2. Give the transport options to `streamable_http_app()`. This method has no `port` option.
+3. Make the lifespan of the host app enter `mcp.session_manager.run()`.
+
+## Gotchas
+
+- Requests on the 2026-07-28 revision have no session. Any replica can answer a request.
+- `stateless_http=True` changes only how the server serves clients of earlier revisions.
+- `json_response=True` sends one JSON body for each request. In this mode, the server cannot send progress notifications during the request.
+- If you do not set `transport_security`, the SDK checks the `Host` and `Origin` headers only when the host is `127.0.0.1`, `localhost`, or `::1`. For all other hosts, for example `0.0.0.0` or a public host name, the server does no check. For these hosts, give `transport_security=TransportSecuritySettings(allowed_hosts=[...], allowed_origins=[...])` (from `mcp.server.transport_security`) to `run()` or `streamable_http_app()`.
+- For browser clients, add CORS to the host app. Allow the `Mcp-*` request headers. Expose the `Mcp-Session-Id` response header.
+- For more than one worker, set `request_state_security=RequestStateSecurity(keys=[...])` (from `mcp.server.mcpserver`) on `MCPServer`. Use the same keys and the same server name on all workers.