# Error Code Master

ClearTax uses conventional HTTP response codes to indicate the success or failure of an API request.

Errors can be of two types&#x20;

1. Invalid or unauthorized request error (4XX)
2. Internal server error (5XX)

The following are the HTTP response codes and their summary. \


| HTTP Response Code                 | Summary                                                                                         |
| ---------------------------------- | ----------------------------------------------------------------------------------------------- |
| 200 - OK                           | Everything worked as expected                                                                   |
| 201 - CREATED                      | The task or workflow was created                                                                |
| 400 - BAD REQUEST                  | The request was unacceptable, often due to  a missing or invalid required parameter             |
| 401 - UNAUTHORIZED                 | No valid auth token provided                                                                    |
| 402 - REQUEST FAILED               | Parameters were valid but request failed                                                        |
| 409 - CONFLICT                     | The request conflicts with another request (perhaps due to pending workflow)                    |
| 429 - TOO MANY REQUESTS            | Too many requests hit the API too quickly. We recommend an exponential backoff of your requests |
| 500, 502, 503, 504 - SERVER ERRORS | Something went wrong on ClearTax end. These are rare                                            |
