You can query error codes returned during the use of the API to troubleshoot the problems.

Client errors

Error code Error message HTTP status code Description
MissingParameter The input parameter "parameter name" that is mandatory for processing this request is not supplied. 400 The error message returned because the required parameters are not set.
InvalidParameter The specified value of parameter "parameter name" is not valid. 400 The error message returned because the parameter value is invalid.
UnsupportedOperation The specified action is not supported. 400 The error message returned because the API operation is invalid.
NoSuchVersion The specified version does not exist. 400 The error message returned because the version of the API operation is invalid.
Throttling Request was denied due to request throttling. 400 The error message returned because the operation is denied by the traffic control system.
InvalidAccessKeyId.NotFound The Access Key ID provided does not exist in our records. 400 The error message returned because the AccessKey pair is invalid.
Forbidden User not authorized to operate on the specified resource. 403 The error message returned because the operation is forbidden.
Forbidden.RiskControl This operation is forbidden by Aliyun Risk Control system. 403 The error message returned because the operation is forbidden by the risk control system.
SignatureDoesNotMatch The signature we calculated does not match the one you provided. Please refer to the API reference about authentication for details. 403 The error message returned because the signature is invalid.
Forbidden.UserVerification Your user account is not verified by Aliyun. 403 The error message returned because real-name verification is not performed.

Server errors

Error code Error message HTTP status code Description
InternalError The request processing has failed due to some unknown error, exception or failure. 500 The error message returned because the server fails to process the request.
ServiceUnavailable The request has failed due to a temporary failure of the server. 503 The error message returned because the server cannot process the request at the moment.