Common Request Headers

**Table 1** Common request headers
Header	Description	Mandatory	Example
X-Auth-Token	User token.	Mandatory if token authentication is in use.	-
Content-Type	Type of content in a request. The value of this field is application/json;charset=utf8.	Mandatory	application/json;charset=utf8
x-sdk-date	Time to send a request. The format is YYYYMMDD'T'HHMMSS'Z. The value is the Greenwich Mean Time (GMT) of the system.	Mandatory if AK/SK authentication is in use.	20160629T101459Z
Authorization	Authentication information, which is the result of request signing.	Mandatory if AK/SK authentication is in use.	-
Host	Requested server information, which is obtained from the URL in an API request. The value is hostname[:port]. If no port number is specified, the default port number will be selected. For HTTPS, the default port number is 443.	Mandatory if AK/SK authentication is in use.	-