| Header| Type| Description|
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Authorization| string| Authentication credentials for HTTP authentication. Example value: “XBL3.0 x=<userhash>;<token>”.|
| x-xbl-contract-version| string| Build name/number of the XBOX LIVE service to which this request should be directed. The request will only be routed to that service after verifying the validity of the header, the claims in the auth token, and so on. Example values: 3, vnext.|
| Accept| string| Content-Types that are acceptable. The only one supported by Presence is application/json, but it must be specified in the header.|
| Accept-Language| string| Acceptable locale for strings in the response. Example values: en-US.|
| Host| string| Domain name of the server. Example value: presencebeta.xboxlive.com.|
| Header| Type| Description|
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| X-RequestedServiceVersion| | Build name/number of the XBOX LIVE service to which this request should be directed. The request will only be routed to that service after verifying the validity of the header, the claims in the auth token, and so on. Default value: 1.|