How AI describes Upstash QStash

QStash is a serverless messaging and scheduling service that sits between your API endpoints and your app, guaranteeing delivery and handling automatic retries without you managing infrastructure. It provides features such as scheduling, fan-out to multiple endpoints, FIFO queuing, rate/parallelism controls, callbacks, dead-letter queues for failed messages, deduplication, and, with the Upstash Workflow SDK, simplified orchestration for complex applications and LLM integrations. It offers quickstart guides and a public API where you publish messages using a QStash token via HTTP, and you can monitor status in the Upstash Console.