Below is a full list of all possible Twilio REST API error codes. For general help, read our guidance on debugging your Twilio application. You can also download all the error codes as JSON.
| Status Codes | Description | Possible Cases | Possible Solution |
|---|---|---|---|
400Bad request | Failed to complete request due to a bad request | - The resource to be modified has moved into a state that is no longer valid. -Input on the request did not pass validation. | - Retry the request after confirming the request is valid. - Verify if the resource to be modified exists and is in a valid state. |
403Forbidden | The request is not authorized | Incorrect credentials | Verify credentials |
404Not Found | Failed to find a match for the request | The specified resource is no longer available. | Check that the specified resource still exists. |
410Unknown Error code | Access to this resource is no longer available and should not be retried. | The resource has reached a terminal state and is no longer available. | Do not retry the request since the condition is likely permanent. |
503Internal Error | An internal error has occurred while processing the request | The server is currently unable to handle the request. | Retry the request at a later time. |