> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.withpersona.com/2021-05-14/authentication/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.withpersona.com/_mcp/server.

# Authentication

> Authenticate Persona API requests with an API key using HTTP Bearer Authentication.

Authentication is performed via HTTP Bearer Authentication. Provide your API key as the bearer token value. All API requests must be made over HTTPS. Calls made over plain HTTP will fail. API requests without authentication will also fail.

```
Authorization: Bearer $API_KEY
```

> Authenticate Persona API requests with an API key using HTTP Bearer Authentication.