| NO_SESSION | 0 | Sorry, No Session is available for this client | 401 |
| INVALID_CREDENTIALS | 5 | Invalid credentials. Credentials are missing or invalid. | 401 |
| FORBIDDEN | 6 | Forbidden. Access forbidden to the requested resource. | 401 |
| SKIP_LIMIT_REACHED | 7 | User has reached their skip limit and may not skip this song. | 200 |
| END_OF_PLAYLIST | 9 | End of available music. There is no more music that can be played from this station. | 200 |
| CANT_SKIP_NO_PLAY | 12 | This play is not currently being played so we can't determine skippability. | 200 |
| INVALID_PARAMETER | 15 | Invalid parameter value. See error message for details. | 400 |
| MISSING_PARAMETER | 16 | Missing a required parameter. See error message for details. | 400 |
| NO_SUCH_OBJECT | 17 | No such object. The requested resource couldn't be found. | 404 |
| UNHANDLED_INTERNAL_ERROR | 18 | Unhandled internal error. | 500 |
| NOT_IN_VALID_LOCATION | 19 | The client's IP address does not map to any valid location and so cannot play music. | 403 |
| PLAYBACK_ALREADY_STARTED | 20 | Playback of this song has already started. | 403 |
| PLAYBACK_COMPLETE | 21 | This play has already completed playback | 403 |
| THROTTLED | 22 | You have exceeded normal request limits and are being throttled | 429 |
| NOT_ON_DEMAND | 23 | This station is not on-demand | 403 |
| FORMAT_UNAVAILABLE | 24 | Unable to find a version of this file that meets format and bitrate constraints | 200 |
| NO_CURRENT_PLAY | 25 | This client has not active play history | 403 |
| EXPIRED_URL | 26 | This URL has expired | 403 |