# Headers

## Request Headers

| Header              | Description                                                                                                                                                                        | Required |
| ------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------- |
| `Content-type`      | This must be `application-json` for all **`POST`** and **`PATCH`** and **`DELETE`** requests                                                                                       | Yes      |
| `OCTO-Capabilities` | Provide a list of capabilites you wish to access in addition to the core API capabilites.   For example:  `octo/content`, `octo/pricing`, `octo/connections`,  `octo/gt-locations` | Optional |

## Response Headers

| Header                      | Description                                                |
| --------------------------- | ---------------------------------------------------------- |
| `OCTO-Capabilities`         | A list of the capabilites that were requested.             |
| `OCTO-RateLimit-Limit`      | The API request limit per minute                           |
| `OCTO-RateLimit-Remaining`  | The number of remaining API requests                       |
| `OCTO-RateLimit-RetryAfter` | Number of seconds to retry your request if your throttled. |


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