> For the complete documentation index, see [llms.txt](https://harmonycms.gitbook.io/platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://harmonycms.gitbook.io/platform/account/api-access.md).

# API Access

## Client credentials

HarmonyCMS API use the  [OAuth 2.0 protocol](http://tools.ietf.org/html/rfc6749) for authentication and authorization through our own API.

## Access token