Common response headers

Response headers that are commonly used.

The following are response headers that are commonly used for all messages or for specific logical groupings of messages.

Table 1. Common response headers
Response Parameter	Style	Type	Description
X-Trans-Id-Extra (Optional)	header/body	String	This value is the length of the error text in the response body.
Content-Type	header/body	String	If the operation fails, this value is the MIME type of the error text in the response body.
X-Trans-Id	header/body	String	A unique transaction ID for this request. Your service provider might need this value if you report a problem.
Date	header/body	DateTime	The transaction date and time. The date and time stamp format is ISO 8601: `CCYY-MM-DDThh:mm:ss-hh:mm`. For example, `2015-08-27T09:49:58-05:00`. The `-hh:mm` value, if included, is the time zone as an offset from UTC. In the previous example, the offset value is `-05:00`. A null value indicates that the token never expires.