> ## 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.

# Service authentication

> XBOX Live service authentication guides covering XSTS tokens, title service auth, website sign-in, and security token claims for GDK titles.

Explore service authentication topics for XBOX game development.

> [card] [Security tokens](https://docs.xbox.com/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/security-tokens/index.md)
>
> Documentation for security tokens.

> [card] [XBOX services authentication (contents)](https://docs.xbox.com/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-service-authentication-nav.md)
>
> This section provides information about XBOX services authentication and tokens.

> [card] [XBOX services authentication for title](https://docs.xbox.com/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-title-service-authentication.md)
>
> This topic describes how to use XBOX services authentication with a custom title service.

> [card] [XBOX services sign-in for title websites](https://docs.xbox.com/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-website-authentication.md)
>
> A variety of scenarios call for building websites or web apps to which users can get authenticated using their Microsoft account (formerly…

> [card] [XBOX services authentication](https://docs.xbox.com/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-xbox-live-authentication.md)
>
> This topic provides background information about XBOX services call authentication.

## See also

* [Custom service config](https://docs.xbox.com/services/xbox-services/fundamentals/s2s-auth-calls/custom-service-config/index.md)
* [S2s calls](https://docs.xbox.com/services/xbox-services/fundamentals/s2s-auth-calls/s2s-calls/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 authentication (contents)](https://docs.xbox.com/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-service-authentication-nav.md)
- [Xbox services authentication for title services](https://docs.xbox.com/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-title-service-authentication.md)
- [Services C API overview - PFAuthentication.h](https://docs.xbox.com/services/playfab/api-references/c/pfauthentication/pfauthentication_members.md)
- [Requesting a User Store ID for service-to-service authentication](https://docs.xbox.com/publishing/xstore-commerce/xstore-requesting-userstoreid.md)