Common Request Headers

**Table 1** Common request headers
Header	Description	Mandatory	Example
X-Auth-Token	User token.	Mandatory for token authentication.	-
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. GMT time is used.	Mandatory for AK/SK authentication.	20160629T101459Z
Authorization	Authentication information, which is the result of request signing.	Mandatory for AK/SK authentication.	-
Host	Requested server information, which is obtained from the URL in an API request. The value is in the format of hostname:port. If no port is specified, the default port will be used. For HTTPS, port 443 is used by default.	Mandatory for AK/SK authentication.	-