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Common parameters

Common request parameters are the request parameters that each interface needs to use. Each time developers use the Volcano Engine API to send a request, they need to carry these common request parameters. Otherwise, the request will fail. The first letters of common request parameters are all capitalized to distinguish them from interface request parameters.

Action and Version

tip

Action and Version must be in the Query.

Name	Type	Is it required?	Parameter format	Description
Action	String	Yes	[a-zA-Z]+	The name of the interface, which is related to the specific interface, indicates the action to be executed.
Version	String	Yes	YYYY-MM-DD	The interface version information. The current version is 2022-01-01.
X-Expires	Int	No	300	The valid time of the signature in seconds, default is 900 seconds if not specified.

Signature parameters

Signature parameters are an essential part of the request and can be in the Header or Query.

Scenarios in Header

Name	Type	Is it required?	Description
X-Date	String	Yes	20201103T104027Z, at UTC time, accurate to the second.
Authorization	String	Yes	HMAC-SHA256 Credential={AccessKey}/{ShortDate}/{Region}/{Service}/request, SignedHeaders={SignedHeaders}, Signature=

The following table shows the meaning of the information in Authorization.

Name	Type	Remarks
AccessKey	String	The requested AK.
ShortDate	String	The short time of the request, accurate to the day. Use UTC time, for example: 20180101.
Region	String	The requested region, for example, China (Beijing): cn-beijing.
ServiceName	String	Requested service, currently rds_mysql.
SignedHeaders	String	Headers participating in the signature, separated by semicolons.
Signature	String	The calculated signature. For details about signature calculation, refer to Signature mechanism.
X-TT-Logid	String	The ID of the request. Keep the algorithm generation consistent.

Scenarios in Query

tip

The information of X-Date and Authorization can directly exist in the Query.

Name	Type	Is it required?	Description
X-Date	String	Yes	20181103T104027Z. It uses UTC time and is accurate to the second.
X-Algorithm	String	Yes	Fixed value, HMAC-SHA256; reserved for future expansion.
X-Credential	String	Yes	Consists of {AccessKey}/{ShortDate}/{Region}/{Service}/request.
X-SignedHeaders	String	Yes	Headers participating in the signature, separated by semicolons.
X-Signature	String	Yes	The calculated signature. For details about signature calculation, refer to Signature mechanism.

For more details, refer to Common parameters.

Last updated: 2025.12.23 21:46:10