> 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/api-reference.md).

# API Reference

- [API Extended Reference](https://docs.aporia.com/api-reference/api-extended-reference.md)
- [Custom Segment Syntax](https://docs.aporia.com/api-reference/custom-segment-syntax.md)
- [Custom Metric Syntax](https://docs.aporia.com/api-reference/custom-metric-syntax.md)
- [Code-Based Metrics](https://docs.aporia.com/api-reference/code-based-metrics.md)
- [Metrics Glossary](https://docs.aporia.com/api-reference/metrics-glossary.md)