# Twinbay

> API digital twins for testing agents: private, stateful copies of provider APIs that paginate, rate-limit and fail like the real thing, and are verified against the vendor's own SDK.

## Product

- [Twinbay overview](/.md)
- [Use cases](/.md#use-cases)
- [Environment workflow](/.md#workflow)
- [Twin fidelity and catalog](/.md#twin-fidelity)
- [Twin catalog, one page per twin](/twins)
- [Twinbay glossary](/.md#glossary)
- [Start building in the Twinbay console](https://console.twinbay.ai)

## Agent resources

- [Agent guide](/AGENTS.md)
- [Markdown sitemap](/sitemap.md)