> ## Documentation Index
> Fetch the complete documentation index at: https://cobo.com/developers/llms.txt
> Use this file to discover all available pages before exploring further.

# Error Codes

<Note>This content applies to WaaS 1.0 only. We highly recommend that you upgrade to [WaaS 2.0](https://www.cobo.com/developers/v2/guides/overview/introduction).</Note>

Cobo servers will return the following error data when encountering an error:

```json theme={null}
{
  "success": false,
  "error_code": 1000,
  "error_description": "Unknown internal error"
}
```

## <font color="blue"> HTTP Status Code </font>

| **Status Code** | **Description**                                                                  |
| :-------------- | :------------------------------------------------------------------------------- |
| 200             | OK                                                                               |
| 400             | Bad request                                                                      |
| 401             | Unauthorized – API key, signature, or timestamp is incorrect                     |
| 403             | Forbidden – No access allowed                                                    |
| 404             | Not Found – Requested resources not found                                        |
| 405             | Method Not Allowed – HTTP methods used not applicable to the requested resources |
| 406             | Not Acceptable – Requested content format is not JSON                            |
| 429             | Too Many Requests – Requests are limited, please reduce the request frequency    |
| 500             | Internal Server Error – Internal server error, please try again later            |
| 502             | Bad Gateway                                                                      |
| 503             | Service Unavailable – Service unavailable, please try again later                |

## <font color="blue"> Error codes starting with 1 </font>

| **Error Code** | **Description**                                                            |
| :------------- | :------------------------------------------------------------------------- |
| 1000           | Unknown internal error – Please contact Cobo                               |
| 1001           | Signature missing, format error, or mismatch                               |
| 1002           | Unsupported 'method' parameter                                             |
| 1003           | API params is missing or null                                              |
| 1004           | Unexpected parameters were provided                                        |
| 1005           | The nonce value is invalid                                                 |
| 1006           | The parameter format or value is invalid                                   |
| 1007           | The current user lacks the necessary permissions                           |
| 1010           | The request is too frequent                                                |
| 1011           | Invalid page\_index value                                                  |
| 1012           | Error request in the production environment                                |
| 1013           | The hash passed by the API is inconsistent with the one calculated locally |
| 1030           | Blacklisted user                                                           |
| 1031           | Unsupported region                                                         |
| 1040           | Errors related to access tokens                                            |
| 1050           | Deprecated API                                                             |
| 1060           | No enough balance                                                          |
| 1070           | cobo card kyc status                                                       |

## <font color="blue"> Error codes starting with 12 </font>

| **Error Code** | **Description**                                                 |
| :------------- | :-------------------------------------------------------------- |
| 12000          | Signature headers missing – API signature header is missing     |
| 12001          | Signature verification failed – API signature verification fail |
| 12002          | Coin not supported                                              |
| 12003          | Permission denied                                               |
| 12004          | Transaction does not exist                                      |
| 12005          | Signature permission denied -- API key does not have access     |
| 12006          | IP not in whitelist                                             |
| 12007          | Insufficient balance                                            |
| 12008          | Coin is suspended temporarily                                   |
| 12009          | Duplicate withdraw request id                                   |
| 12010          | Account has been frozen                                         |
| 12011          | Amount below coin dust                                          |
| 12012          | Invalid address                                                 |
| 12013          | Address not in whitelist                                        |
| 12014          | Transaction fee invalid                                         |
| 12015          | Address does not exist                                          |
| 12016          | Insufficient Credit                                             |
| 12021          | duplicated signature                                            |
| 12022          | blockchain node API call error                                  |
| 12200          | staking product not exist                                       |
| 12201          | invalid staking amount                                          |
| 12202          | invalid staking status                                          |
| 12203          | Unsupported transfer from staking wallet                        |