> ## 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.

# Service calls to XBOX services

> Overview of authenticating title services with XBOX Live to invoke REST endpoints, covering S2S call flows and Business Partner Certificate setup.

Information about authenticating through XBOX services.

## In this section

[Title service calls to XBOX services](/services/xbox-services/fundamentals/s2s-auth-calls/s2s-calls/live-title-service-calls-xbox-live)
Describes how to call XBOX services from a custom title service.

[Service-to-service calling patterns](/services/xbox-services/fundamentals/s2s-auth-calls/s2s-calls/s2s-call-patterns/live-s2s-call-patterns-nav)
Provides details on XBOX Live service-to-service calling patterns.


## Related topics

- [S2s calls](/services/xbox-services/fundamentals/s2s-auth-calls/s2s-calls/index.md)
- [XBOX services authentication](/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-xbox-live-authentication.md)
- [Service-to-service multiplayer session management](/services/xbox-services/fundamentals/s2s-auth-calls/s2s-calls/s2s-call-patterns/live-mpsd-service-to-service.md)
- [How to use XBOX Services APIs (XSAPIs)](/services/xbox-services/fundamentals/xbox-services-api/live-gs-xbl-apis.md)
- [XBOX services authentication for title services](/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-title-service-authentication.md)