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Documentationchevron_rightCommunitychevron_rightHow to handle long-running background tasks in MCP?

How to handle long-running background tasks in MCP?

Long-running operations can't block a request thread. Here is the recommended pattern for background tasks in MCP.

Follow these setup steps

No external page exists yet — expand the steps below to complete this guide right here.

The Short Answer

Deregister long-running tasks from the request thread, persist their progress, and notify the client asynchronously via webhooks or event streams. Never hold a single JSON-RPC call open for minutes.

Expose a task/<id> resource so clients can poll status, and emit notifications/message events as progress updates arrive.

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Pro Tip: Idempotent Retries

Make every background action idempotent so a retried request can't double-charge or double-insert.