> ## Documentation Index
> Fetch the complete documentation index at: https://creditor-documentation.debbiecollect.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Authentication

> Authenticate using bearer token

Authentication with an API key can be done by using a bearer token in the Authorization header. This is done using the following format `Authorization: Bearer {token}`.

```header theme={null}
Authorization: Bearer {token}
```

API keys are issued and revoked directly from the creditor portal. Go to the Developer section in the menu, click API, name the API key and select the scopes it needs. The key is only shown once, when it is created.

On the same page you will find the `tenantId` and `creditorId` used in the API calls.