# Status code

| Code  | Description                                     | Suggestion                                                                                                             |
| ----- | ----------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------- |
| 0     | Success                                         |                                                                                                                        |
| 100   | Request parameter error                         | It usually appears on a `POST` request. Please check that the json structure whether correct.                          |
| 103   | Invalid signature                               | Please check [signature generation](/description/signature-generation.md).                                             |
| 104   | Signature expired                               | Please sign again or check the server time.                                                                            |
| 11000 | Operation failed, please try again later.       | Usually, the service changes or becomes inoperable. You can give up or try again. Adjust according to `msg` prompts.   |
| 11001 | Operate too frequently, please try again later. | Limit `5` requests per second for `app id`. Place reduce the request frequency or add new applications.                |
| 11003 | Miss required parameter                         | Please carefully check document and the parameter type and value of the actual request whether rational and effective. |
| 12001 | Data is existed                                 |                                                                                                                        |
| 12002 | Data is absence                                 |                                                                                                                        |
| 12003 | Data is empty                                   |                                                                                                                        |
| 20000 | Application is absence                          |                                                                                                                        |
| 20001 | Application is disable                          |                                                                                                                        |
| 20002 | Under balance                                   | Please go to the user center to [recharge](https://ttpay.io/console/pages/recharge?lang=en).                           |
| 20003 | Under quota                                     |                                                                                                                        |
| 20004 | Request frequency limitation                    |                                                                                                                        |
| 20005 | Invalid parameter                               | Adjust according to `msg` prompts.                                                                                     |


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