> ## Documentation Index
> Fetch the complete documentation index at: https://docs.interhuman.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Authentication

Interhuman now supports direct API-key authentication for API requests.

Use your API key in the `Authorization` header:

```http theme={null}
Authorization: Bearer <api_key>
```

If you still need a key, start with [Get an API key](/how-to/get-api-key).

## Migration from the legacy flow

We migrated from a two-step authentication flow to a one-step flow:

* **Legacy flow:** send `key_id` and `key_secret` to `/auth`, receive a short-lived token, then call API endpoints with that token.
* **Current flow:** call API endpoints directly with your API key in `Authorization: Bearer <api_key>`.