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

# Authentication

> Learn how to authenticate your API requests to Holdstation Pay.

## API Key Authentication

To authenticate API requests, include a valid API key in the request headers. You can request an API key by contacting the Holdstation support team.

### Header Format

```bash theme={null}
Partner-App-Key: YOUR_API_KEY
```

### Example Request

```bash theme={null}
curl -X GET https://pay-api.holdstation.com/api/v1/tokens \
  -H "Partner-App-Key: YOUR_API_KEY"
```

## Security Scheme

The API uses the `apiKey` security scheme with the key passed in the request header:

| Parameter       | Value             |
| --------------- | ----------------- |
| **Type**        | API Key           |
| **Location**    | Header            |
| **Header Name** | `Partner-App-Key` |

<Note>
  Some endpoints such as **List Banks** and **List Tokens** are publicly accessible and do not require authentication.
</Note>