| Session | 1001 | Signature expired |
| 1002 | Invalid signature |
| 1003 | Invalid user_id |
| 1004 | App Key is not exist |
| 1005 | Invalid timestamp |
| 1006 | App has no service |
| 1007 | Simultaneous opening of sessions exceeds limit |
| Bio-data analysis service | 2001 | Biodata services are uninitialized |
| 2002 | Test app has exceeded the limit |
| 2003 | App's remaining amount is not enough |
| 2004 | The key'X' is incorrect |
| 2005 | No'X' service |
| 2006 | The value of'X' is incorrect |
| Affective cloud service | 3001 | Affective services are not started |
| 3002 | No'X' service |
| 3003 | Test app has exceeded the limit |
| 3004 | App's remaining amount is not enough |
| 3005 | The key'X' is incorrect |
| Other | 400 | Request exception |
| 401 | Session not exist, create a session first. |
| 404 | Sevice not exist |
| 405 | Operation is too frequently |