This topic describes the client errors.

Error message Error code Description HTTP status code
The parameter is missing. MissingParameter The input parameter <parameter name> that is mandatory for processing this request is not supplied 400
The parameter value is invalid. InvalidParameter The specified value of parameter <parameter name> is not valid. 400
The interface is invalid. UnsupportedOperation The specified action is not supported. 400
The version is invalid. NoSuchVersion The specified version does not exist. 400
The operation is rejected by the traffic control system. Throttling Request was denied due to request throttling. 400
The AccessKey is invalid. InvalidAccessKeyId.NotFound The AccessKey ID provided does not exist in our records. 400
The operation is forbidden. Forbidden Users are not authorized to operate on the specified resource. 403
The operation is forbidden by the risk control system. Forbidden.RiskControl This operation is forbidden by Aliyun Risk Control system. 403
The signature is invalid. SignatureDoesNotMatch The signature we calculated does not match the one you provided. 403
Auto Scaling is not activated and thus the API cannot be called. Forbidden.Unsubscribed Do not have permission to access this API. 403
Real-name verification is missing. Forbidden.UserVerification Your user account is not verified by Aliyun. 403
Auto Scaling is not supported by the specified region. ResourceNotAvailable Resource you requested is not available in this region or zone. 400