> For the complete documentation index, see [llms.txt](https://documentation.alluxio.io/ee-ai-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.alluxio.io/ee-ai-en/reference.md).

# Reference

This section contains detailed reference materials for Alluxio, including API documentation, command-line interface (CLI) usage, and other technical information.

* [**S3 API**](/ee-ai-en/reference/s3-api-usage.md): Examples and usage details for the S3-compatible API.
* [**REST API**](/ee-ai-en/reference/rest-api.md): Documentation for the Alluxio REST API endpoints.
* [**User CLI**](/ee-ai-en/reference/user-cli.md): A guide to the Alluxio command-line interface for users.
* [**Metrics**](/ee-ai-en/reference/metrics.md): A comprehensive list of metrics exposed by Alluxio for monitoring.
* [**Third-Party Licenses**](/ee-ai-en/reference/third-party-licenses.md): Information about third-party licenses used in Alluxio.