您调用API服务后，系统会返回HTTP状态码。如果返回的状态码为2xx，代表调用成功；返回4xx或5xx代表调用失败。调用成功返回的数据格式暂时只支持JSON。如果您使用外部系统发送请求，可在参数中定制返回的数据格式。

成功结果

XML示例 

<?xml version="1.0" encoding="UTF-8"?> 
<!--结果的根结点-->
<接口名称+Response>
    <!--返回请求标签-->
    <RequestId>4C467B38-3910-447D-87BC-AC049166F216</RequestId>
    <!--返回结果数据-->
</接口名称+Response>

JSON示例 

{
    "RequestId": "4C467B38-3910-447D-87BC-AC049166F216",
    /* 返回结果数据 */
}

错误结果

调用接口出错后，将不会返回结果数据。调用方可根据每个接口对应的错误码以及公共错误码来定位错误原因。

当调用出错时，HTTP请求返回一个4xx或5xx的HTTP状态码。返回的消息体中是具体的错误代码及错误信息。另外还包含一个全局唯一的请求 ID：RequestId和一个您该次请求访问的站点ID：HostId。在调用方找不到错误原因时，可以联系阿里云客服，并提供该HostId和RequestId，以便帮您尽快解决问题。

XML示例（请求过期） 

<KMS>
<HttpStatus>400</HttpStatus>
<Code>IllegalTimestamp</Code>
<Message>The input parameter "Timestamp" that is mandatory for processing this request is not supplied.</Message>
<RequestId>3b237773-bc2c-4bea-95fc-319a1a5baa68</RequestId>
</KMS>

JSON示例（请求过期） 

{
"HttpStatus": 400
"Code": "IllegalTimestamp"
"Message": "The input parameter "Timestamp" that is mandatory for processing this request is not supplied."
"RequestId": "e85db688-a2d3-44ca-9790-4259f59e90d8"
}

公共错误码

错误代码 描述 HTTP 状态码
InternalFailure Internal Failure. 500
ServiceUnavailableTemporary Service Unavailable Temporary. 503
InvalidAccessKeyId.NotFound The AccessKey ID provided does not exist in our records. 404
Forbidden.KeyNotFound The specified Key is not found. 404
Forbidden.KeyVersionNotFound The specified Key version is not found. 404
Forbidden.AliasNotFound The specified Alias is not found. 404
Forbidden.NoPermission This operation is forbidden by permission system. 403
Forbidden.AccessKey This AccessKey is not enabled. 403
UnsupportedHTTPMethod This http method is not supported. 403
Forbidden.UbsmsInvalidUserid Userid Invalid For Ubsms. 403
Forbidden.UbsmsInvalidBid Your account partner does not have KMS Service. 403
Forbidden.KmsServiceNotEnabled Kms service is not Enabled for current user. Please get access permission first. 403
Forbidden.ProhibitedByRiskControl Current user is Prohibited By Risk Control. 403
Forbidden.InDebtOverdue Current user is indebted Overdue. 403
Forbidden.InDebt Current user is indebted. 403
ParseRequestParameterException Server parse parameters exception. Please check your input params. 400
MissingParameter The parameter "< parameter name >" is needed but not provided. 400
InvalidParameter The specified parameter "< parameter name >" is not valid. 400
IncompleteSignature The request signature does not conform to Alibaba Cloud standards. 400
IllegalTimestamp The input parameter "Timestamp" that is required for processing this request is not supplied. 400
Rejected.LimitExceeded The request was rejected because user create resource limit was exceeded. 400
AliasAlreadyExists AliasName Already Exists. 400
InvalidKeyMaterial key material is invalid. 400
InvalidImportToken import token is invalid. 400
ExpiredImportToken import token is expired. 400
Unsupported.Origin This key origin is not valid for this api. 400
Unsupported.Alias Alias is not valid for this api. 400
Unsupported.ProtectionLevel This protection level is not valid for this region 400
Rejected.StateModifiedFailed Keystate modified failed. 409
Rejected.Disabled The request was rejected because the key state is Disabled. 409
Rejected.PendingDeletion The request was rejected because the key state is PendingDeletion. 409
Rejected.PendingImport The request was rejected because the key state is PendingImport. 409