> For the complete documentation index, see [llms.txt](https://fusionauth.io/docs/llms.txt)

# OpenAPI Specification

Learn about the FusionAuth OpenAPI Specification, which allows you to use OpenAPI tooling to interact with FusionAuth.

This OpenAPI Specification allows you to use FusionAuth with OpenAPI tooling. It supports OpenAPI version 3.

The [OpenAPI specification project](https://github.com/FusionAuth/fusionauth-openapi) contains the YAML file and a README with further information, including known issues.

The [current OpenAPI specification](https://raw.githubusercontent.com/FusionAuth/fusionauth-openapi/main/openapi.yaml) suitable for downloading and using.