> For the complete documentation index, see [llms.txt](https://docs.acymailing.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.acymailing.com/rest-api/overview/authentication.md).

# Authentication

All  API endpoints requests are authenticated using [HTTPS Basic Auth](https://en.wikipedia.org/wiki/Basic_access_authentication). It requires you to provide an API key.

The API key to provide is a valid AcyMailing License key, you can find it in the [License tab](https://www.acymailing.com/account/license/) of your account.

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