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Expire idle Streamable HTTP sessions by default and cap concurrent sessions (#3395)

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Max 2026-08-28 15:54:49 +01:00 • committed by GitHub
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5
docs/run/index.md
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@ -70,6 +70,11 @@ Each transport has its own keyword arguments, all on `run()`:
* `max_request_body_size`: largest accepted request 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.
* `session_idle_timeout`: seconds a legacy session may sit with nothing in flight before the
server closes it. Default 1800. `None` disables it. See
[Session lifetime and limits](legacy-clients.md#session-lifetime-and-limits).
* `max_sessions`: how many legacy sessions one process holds at once. Default 10 000. `None`
removes the limit. Covered in the same section.
* `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