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

# Authentication

The API uses Bearer Token Authentication via the Authorization header.

`Header Name: Authorization` \
`Header Value Format: Bearer <YOUR_API_KEY>`&#x20;

API Key Format: Your API key should have the following format: `run_<prefix>_<value>`&#x20;