Method log

src/mcp/server/context.py:99–111

Send a request-scoped `notifications/message` log entry. Uses this request's back-channel (so the entry rides the request's SSE stream in streamable HTTP), not the standalone stream - use `ctx.connection.log(...)` for that.

(self, level: LoggingLevel, data: Any, logger: str | None = None, *, meta: Meta | None = None)

    @deprecated("The logging capability is deprecated as of 2026-07-28 (SEP-2577).", category=MCPDeprecationWarning)
    async def log(self, level: LoggingLevel, data: Any, logger: str | None = None, *, meta: Meta | None = None) -> None:
        """Send a request-scoped `notifications/message` log entry.

        Uses this request's back-channel (so the entry rides the request's SSE
        stream in streamable HTTP), not the standalone stream - use
        `ctx.connection.log(...)` for that.
        """
        params: dict[str, Any] = {"level": level, "data": data}
        if logger is not None:
            params["logger"] = logger
        if meta:
            params["_meta"] = meta
        await self.notify("notifications/message", params)


HandlerResult = BaseModel | dict[str, Any] | None