> ## Documentation Index
> Fetch the complete documentation index at: https://docs.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.

> [card] [Making async calls in the XSAPI c API](https://docs.xbox.com/services/xbox-services/fundamentals/xbox-services-api/live-flatc-async-patterns.md)
>
> 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] [Backwards compatibility with XDK XSAPI](https://docs.xbox.com/services/xbox-services/fundamentals/xbox-services-api/live-gs-backcompat-api.md)
>
> 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] [How to use XBOX services APIs (xsapis)](https://docs.xbox.com/services/xbox-services/fundamentals/xbox-services-api/live-gs-xbl-apis.md)
>
> XSAPIs depend on Gaming Runtime Services (GRTS).

> [card] [XBOX services API](https://docs.xbox.com/services/xbox-services/fundamentals/xbox-services-api/live-introduction-to-xbox-live-apis.md)
>
> There are two ways to get information from XBOX services.

> [card] [XSAPI c](https://docs.xbox.com/services/xbox-services/fundamentals/xbox-services-api/live-xsapi-flat-c.md)
>
> In June 2018, a C API layer was added to XSAPI.

## See also

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


## Related topics

- [Xbox services authentication](https://docs.xbox.com/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-xbox-live-authentication.md)
- [Xbox services API overview](https://docs.xbox.com/services/xbox-services/fundamentals/xbox-services-api/live-introduction-to-xbox-live-apis.md)
- [Xbox services API reference (contents)](https://docs.xbox.com/reference/live/gc-reference-live-toc.md)
- [How to use XBOX services APIs](https://docs.xbox.com/services/xbox-services/fundamentals/xbox-services-api/live-gs-xbl-apis.md)
- [Xbox services RESTful reference](https://docs.xbox.com/reference/live/rest/atoc-xboxlivews-reference.md)