> ## Documentation Index
> Fetch the complete documentation index at: https://upstash-dx-3122-agent-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Upstash QStash

> Serverless messaging and scheduling with guaranteed delivery and retries.

QStash is a serverless messaging and scheduling service. Instead of calling an endpoint directly, you publish a message to QStash, which delivers it to your API with retries, delays, schedules, and more.

## Start here

* [Getting Started](/qstash/overall/getstarted): publish your first message.
* [Use Cases](/qstash/overall/usecases)
* [Pricing & Limits](/qstash/overall/pricing)

## Sections

* [Quickstarts](/qstash/quickstarts/vercel-nextjs): Next.js, Python, Cloudflare Workers, AWS Lambda, Deno Deploy, and Go.
* [Features](/qstash/features/background-jobs): background jobs, retries, schedules, queues, flow control, delays, URL groups, batching, callbacks, and dead letter queues.
* [Integrations](/qstash/integrations/llm)
* [How To](/qstash/howto/publishing): publishing, receiving, verifying signatures, local development, and more.
* [REST API](/qstash/api/authentication)
* [SDKs](/qstash/sdks/ts/overview): TypeScript and Python.

## For AI agents

* [/docs/qstash/llms.txt](https://upstash.com/docs/qstash/llms.txt) lists every QStash page.
* Append `.md` to any page URL for its Markdown, for example [/docs/qstash/overall/getstarted.md](https://upstash.com/docs/qstash/overall/getstarted.md).


## Related topics

- [Prometheus - Upstash QStash Integration](/qstash/integrations/prometheus.md)
- [Datadog - Upstash QStash Integration](/qstash/integrations/datadog.md)
- [Development Server](/workflow/howto/local-development/development-server.md)


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.