> ## Documentation Index
> Fetch the complete documentation index at: https://devdocs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Standard HTTP Request and Response Headers

> Standard HTTP Request and Response Headers

# Standard HTTP Request and Response Headers

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## Request Headers

The following table lists the standard HTTP headers used when making XBOX Live Services requests.

| Header                 | Value                                                                                       | Description                                                                                                                                                                                        |
| ---------------------- | ------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| x-xbl-contract-version | 1                                                                                           | API contract version. Required on all XBOX Live Services requests.                                                                                                                                 |
| Authorization          | STSTokenString                                                                              | STS authentication token. The value for this header is retrieved from the <b>GetTokenAndSignatureResult.Token</b> property.                                                                        |
| Content-Type           | application/xml, application/json, multipart/form-data or application/x-www-form-urlencoded | Specifies the type of content being submitted with a request.                                                                                                                                      |
| Content-Length         | Integer value                                                                               | Specifies the length of the data being submitted in a POST request.                                                                                                                                |
| Accept-Language        | String                                                                                      | Specifies how to localize any strings returned. See <a href="https://msdn.microsoft.com/library/bb975829.aspx">Advanced XBOX 360 Programming</a> for a list of valid language/locale combinations. |

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## Response Headers

The following table lists the standard HTTP header used in XBOX Live Services responses.

\| Header| Value| Description|
\| --- | --- | --- | --- | --- | --- |
\| Content-Type| application/xml, application/json| Specifies the type of content being returned.|
\| Content-Length| Integer value| Specifies the length of the data being returned.|

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## See also

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##### Parent

[Additional Reference](/reference/live/rest/additional/atoc-xboxlivews-reference-additional)


## Related topics

- [HCHttpCallResponseSetHeader](/reference/live/httpclient/httpprovider/functions/hchttpcallresponsesetheader.md)
- [HCHttpCallResponseGetHeader](/reference/live/httpclient/httpclient/functions/hchttpcallresponsegetheader.md)
- [HCHttpCallResponseGetHeaderAtIndex](/reference/live/httpclient/httpclient/functions/hchttpcallresponsegetheaderatindex.md)
- [HCHttpCallResponseSetHeaderWithLength](/reference/live/httpclient/httpprovider/functions/hchttpcallresponsesetheaderwithlength.md)
- [HCHttpCallResponseGetNumHeaders](/reference/live/httpclient/httpclient/functions/hchttpcallresponsegetnumheaders.md)