Errors

GitBook uses conventional HTTP response codes to indicate the success or failure of an API request.

As a general rule:

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:

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