> For the complete documentation index, see [llms.txt](https://octodocs.peek.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://octodocs.peek.com/getting-started/headers.md).

# Headers

## Request Headers <a href="#request-headers" id="request-headers"></a>

| Header         | Description                                                                   |
| -------------- | ----------------------------------------------------------------------------- |
| `Content-Type` | This must be `application/json` for all `POST` `PATCH` and `DELETE` requests. |

## Response Headers <a href="#response-headers" id="response-headers"></a>

| Header              | Description                                                                                                                                      |
| ------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ |
| `Octo-Capabilities` | <p>A list of the capabilities that were initialised with this request.</p><p>e.g. <code>Octo-Capabilities: octo/pricing, octo/content</code></p> |
| `Octo-Env`          | This will return `test` if the request is in test, or `live` if it wasn't.                                                                       |