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Add Streamable HTTP request body limits (#3095)

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Marcelo Trylesinski 2026-07-16 08:33:32 +02:00 • committed by GitHub
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docs/run/index.md
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@ -67,6 +67,9 @@ Each transport has its own keyword arguments, all on `run()`:
* `streamable_http_path`: where the MCP endpoint lives. Default `/mcp`.
* `json_response=True`: answer with plain JSON instead of an SSE stream.
* `stateless_http=True`: a fresh transport per request, no session tracking.
* `max_request_body_size`: largest accepted POST body in bytes. Defaults to 4 MiB; larger requests
receive HTTP 413 before parsing or session creation. Raise it only when legitimate MCP messages
exceed that size.
* `event_store`, `retry_interval`, `transport_security`: resumability and DNS-rebinding protection. They can wait, until you deploy somewhere other than localhost; **[Deploy & scale](deploy.md)** covers `transport_security`.
!!! warning