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

# Authentication

The API relies on provisioned API keys for authentication and access. In order to obtain a key, please contact us at <https://www.cryptosat.io/contact>.

The key must be included with the header of each request:

<mark style="color:blue;">`GET`</mark> `{{api-url}}/{{request}}`

#### Headers

| Name                                        | Type   | Description              |
| ------------------------------------------- | ------ | ------------------------ |
| x-api-key<mark style="color:red;">\*</mark> | String | The provisioned API key. |

{% tabs %}
{% tab title="200: OK " %}

```javascript
{
    // Response
}
```

{% endtab %}
{% endtabs %}