> For the complete documentation index, see [llms.txt](https://developer.branta.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.branta.pro/tech/authentication.md).

# Authentication

`POST`ing to Branta requires API key authentication.

Include `Authorization: Bearer my_key_123` in the HTTP Header to authenticate.

{% hint style="danger" %}
API keys carry sensitive privileges so they should be kept secure at all times. Do not commit them to code or share them publicly.
{% endhint %}