Reference · GlossaryDead letter queueStorage for **failed automation jobs** after retries exhaust — so nothing silently disappears.On this pageWhen to useWhen notExample#When to useWebhook + LLM pipelines with async workers.#When notSynchronous request/response APIs with immediate error codes.#ExampleThird retry fails on LLM timeout → message moves to DLQ → on-call replays after fix.Learn by doing → Learn by doing →Related termsWebhookIdempotency← All terms