> ## 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.

# XBOX services API

> Guides for the XBOX Services API (XSAPI): C API async patterns, XDK C++ backwards compatibility, XSAPI initialization, and REST endpoint alternatives.

Documentation for XBOX services API.

<CardGroup cols={2}>
  <Card title="Making async calls in the XSAPI c API" icon="lightbulb" href="/services/xbox-services/fundamentals/xbox-services-api/live-flatc-async-patterns">
    An asynchronous API is an API that returns quickly but starts an asynchronous task and the result is returned after the task is finished.
  </Card>

  <Card title="Backwards compatibility with XDK XSAPI" icon="lightbulb" href="/services/xbox-services/fundamentals/xbox-services-api/live-gs-backcompat-api">
    While the XSAPI (XBOX Service API) is offered as a C library, the GDK also includes headers for a C++ version of the XSAPI that shipped…
  </Card>

  <Card title="How to use XBOX services APIs (xsapis)" icon="book-open" href="/services/xbox-services/fundamentals/xbox-services-api/live-gs-xbl-apis">
    XSAPIs depend on Gaming Runtime Services (GRTS).
  </Card>

  <Card title="XBOX services API" icon="circle-info" href="/services/xbox-services/fundamentals/xbox-services-api/live-introduction-to-xbox-live-apis">
    There are two ways to get information from XBOX services.
  </Card>

  <Card title="XSAPI c" icon="circle-info" href="/services/xbox-services/fundamentals/xbox-services-api/live-xsapi-flat-c">
    In June 2018, a C API layer was added to XSAPI.
  </Card>
</CardGroup>

## See also

* [Game binding](/services/xbox-services/fundamentals/game-binding/index)
* [Identity](/services/xbox-services/fundamentals/identity/index)
* [Portal config](/services/xbox-services/fundamentals/portal-config/index)
* [Rta](/services/xbox-services/fundamentals/rta/index)
* [S2s auth calls](/services/xbox-services/fundamentals/s2s-auth-calls/index)
* [Sandboxes](/services/xbox-services/fundamentals/sandboxes/index)


## Related topics

- [XBOX services API](/services/xbox-services/fundamentals/xbox-services-api/index.md)
- [XBOX services 概述](/zh-CN/services/xbox-services/fundamentals/live-xbl-overview.md)
- [XBOX services overview](/services/xbox-services/fundamentals/live-xbl-overview.md)
- [XBOX services authentication](/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-xbox-live-authentication.md)
- [XBOX services 認証](/ja-jp/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-xbox-live-authentication.md)