> For the complete documentation index, see [llms.txt](https://docs.pretium.africa/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pretium.africa/api-reference/headers.md).

# Headers

All API endpoints require an x-api-key header for authentication. Include your unique API key in the x-api-key header with every request to access the API. Requests without this header or with an invalid key will result in a 401 Unauthorized response.

<figure><img src="/files/lp1bw804n9Hd5SuFbHT8" alt=""><figcaption></figcaption></figure>

**Header**

```

  'x-api-key': {{consumer_key}}

```

**Unauthorized response**

{% tabs %}
{% tab title="401 " %}

```
{
   "code": 401,
   "message": "Unauthorized"
}
```

{% endtab %}
{% endtabs %}