Public parameters - API Reference| Alibaba Cloud Documentation Center

Public request parameters

Public request parameters indicates the request parameters required in each API call.

Name	Type	Required?	Description
Format	String	No	Type of returned value. JSON and XML are supported. XML is the default format.
Version	String	Yes	API version. Format: `YYYY-MM-DD`. The current version is `2015-01-09`.
AccessKeyId	String	Yes	ID of the AccessKey that Alibaba Cloud issued to you to access services.
Signature	String	Yes	Signature result. For the signature calculation method, see Signature mechanism.
SignatureMethod	String	Yes	Signature method. `HMAC-SHA1` is supported currently.
Timestamp	String	Yes	Request time stamp. The date and time stamp uses the UTC system, and the format complies with ISO8601. The format is `YYYY-MM-DDThh:mm:ssZ`. For example, `2015-01-09T12:00:00Z` indicates 12:00:00, January 9, 2015, Beijing time.
SignatureVersion	String	Yes	Signature algorithm version. The current version is `1.0`.
SignatureNonce	String	Yes	A unique random number, which is used to prevent network replay attacks. Different random numbers must be used for different requests.

Example

https://dns.aliyuncs.com/
?Format=xml
&Version=2015-01-09
&Signature=Pc5WB8gokVn0xfeu%2FZV%2BiNM1dgI%3D 
&SignatureMethod=HMAC-SHA1
&SignatureNonce=15215528852396
&SignatureVersion=1.0
&AccessKeyId=key-test
&Timestamp=2015-01-09T12:00:00Z
…

Public return parameters

Each time you send a call request to an API, the system returns a unique RequestId, whether the request is successful or not.

Example

XML example

<?xml version="1.0" encoding="UTF-8"?> 
<!—Result Root Node-->
<Interface Name+Response>
    <!—Return Request Tag-->
    <RequestId>4C467B38-3910-447D-87BC-AC049166F216</RequestId>
    <!—Return Result Data-->
</Interface Name+Response>

JSON example

{
    "RequestId": "4C467B38-3910-447D-87BC-AC049166F216"
    /* Return Result Data*/
}