> For the complete documentation index, see [llms.txt](https://api.circle.so/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://api.circle.so/apis/headless/auth-sdk/ruby.md).

# Ruby

To authenticate members from a Ruby backend, call the Auth API directly. See the [Quick start](/apis/headless/quick-start.md) and the [Auth API Swagger docs](https://api-headless.circle.so/) for a backend-agnostic approach. If you need any help, please contact the Headless team.