> For the complete documentation index, see [llms.txt](https://docs.aporia.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aporia.com/v1/api-reference.md).

# API Reference

- [Custom Metric Definition Language](https://docs.aporia.com/v1/api-reference/custom-metric-definition-language.md)
- [REST API](https://docs.aporia.com/v1/api-reference/rest-api.md)
- [Metrics Glossary](https://docs.aporia.com/v1/api-reference/metrics-glossary.md)