| BadRequestException | Represents an HTTP 400 error. |
| ConflictException | Represents an HTTP 409 error. |
| ForbiddenException | Represents an HTTP 403 error. |
| GoneException | Represents an HTTP 410 error. |
| HttpException | Parent class for all of the HTTP related exceptions in CakePHP. |
| InternalErrorException | Represents an HTTP 500 error. |
| InvalidCsrfTokenException | Represents an HTTP 403 error caused by an invalid CSRF token |
| MethodNotAllowedException | Represents an HTTP 405 error. |
| NotAcceptableException | Represents an HTTP 406 error. |
| NotFoundException | Represents an HTTP 404 error. |
| NotImplementedException | Not Implemented Exception - used when an API method is not implemented |
| ServiceUnavailableException | Represents an HTTP 503 error. |
| UnauthorizedException | Represents an HTTP 401 error. |
| UnavailableForLegalReasonsException | Represents an HTTP 451 error. |
