The following list of request parameters only lists interface request parameters and some public parameters, For a complete list of public parameters see public request parameters.

Parameter name	Required	Allow NULL	Type	Description
Action	Yes	No	String	Public parameter, The value of this interface: DescribeVulHostTop
Version	Yes	No	String	Public parameter, The value of this interface: 2018-02-28
Region	No	No	String	Public parameter,Regional information This interface does not need to pass this parameter.
IsFollowVul	No	No	Uint64	Specifies whether to count only critical vulnerabilities. 1: only counts critical vulnerabilities. 0: counts all types of vulnerabilities Example: 1
Top	Yes	No	Uint64	Top N value, in the range of 1 to 100. Example: 1
VulCategory	No	No	Uint64	1: Web-CMS vulnerability. 2: application vulnerability. 4: Linux software vulnerability. 5: Windows system vulnerability. 6: emergency vulnerability. If this parameter is left empty or set to 0, the supported types of vulnerabilities specified by 1, 2, 4, and 5 will be queried. Example: 2

3. Output Parameters

Parameter name	Type	Description
VulHostTopList	Array of VulHostTopInfo	Top server risks. Example:View
RequestId	String	Unique request id, Each request will return. The RequestId of the request needs to be provided when locating the problem.

4. Error Code

The following lists only the error codes related to the interface business logic, For other error codes, see public ErrorCode.

Error Code	Description
InternalError	Internal error.
InvalidParameter.ParsingError	Parameter parsing error.
InvalidParameter.MissingParameter	Missing parameter.
InvalidParameter.InvalidFormat	Incorrect parameter format.
MissingParameter	Missing parameter.
InvalidParameter	Invalid parameter.
InvalidParameterValue	The parameter value is invalid.