> For the complete documentation index, see [llms.txt](https://p0kk-co.gitbook.io/playground/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://p0kk-co.gitbook.io/playground/status-codes.md).

# Status Codes

Responses from the API use HTTP response codes are used to indicate general classes of success and error.

| Status code range | Description                         |   |
| ----------------- | ----------------------------------- | - |
| **`2xx`**         | Successfully processed the request. |   |
| **`4xx`**         | Incorrect or incomplete parameters  |   |
| **`5xx`**         |                                     |   |

* Codes in the **`2xx`** range indicate success.
* Codes in the **`4xx`** range indicate incorrect or incomplete parameters (e.g. a required parameter was omitted, or an operation failed with a 3rd party, etc.).
* Codes in the **`5xx`** range indicate an error with GitBook's servers.

GitBook also outputs an error message and an error code formatted in JSON:

Copy

```
{
    "error": {
        "code": 404,
        "message": "Page not found in this space"
    }
}
```

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