fastmcp.server.middleware.ping

Ping middleware for keeping client connections alive.

Classes

PingMiddleware ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/ping.py#L10" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

Middleware that sends periodic pings to keep client connections alive.

Starts a background ping task on first message from each session. The task sends server-to-client pings at the configured interval until the session ends.

Methods:

on_message ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/ping.py#L42" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

on_message(self, context: MiddlewareContext, call_next: CallNext) -> Any

Start ping task on first message from a session.