> ## 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 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.

<CardGroup cols={2}>
  <Card title="Security tokens" icon="lock" href="/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/security-tokens/index">
    Documentation for security tokens.
  </Card>

  <Card title="XBOX services authentication (contents)" icon="right-to-bracket" href="/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-service-authentication-nav">
    This section provides information about XBOX services authentication and tokens.
  </Card>

  <Card title="XBOX services authentication for title" icon="lightbulb" href="/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-title-service-authentication">
    This topic describes how to use XBOX services authentication with a custom title service.
  </Card>

  <Card title="XBOX services sign-in for title websites" icon="right-to-bracket" href="/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-website-authentication">
    A variety of scenarios call for building websites or web apps to which users can get authenticated using their Microsoft account (formerly…
  </Card>

  <Card title="XBOX services authentication" icon="right-to-bracket" href="/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-xbox-live-authentication">
    This topic provides background information about XBOX services call authentication.
  </Card>
</CardGroup>

## See also

* [Custom service config](/services/xbox-services/fundamentals/s2s-auth-calls/custom-service-config/index)
* [S2s calls](/services/xbox-services/fundamentals/s2s-auth-calls/s2s-calls/index)


## Related topics

- [XBOX services authentication](/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-xbox-live-authentication.md)
- [XBOX services authentication (contents)](/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-service-authentication-nav.md)
- [XBOX services authentication for title services](/services/xbox-services/fundamentals/s2s-auth-calls/service-authentication/live-title-service-authentication.md)
- [Services C API overview - PFAuthentication.h](/services/playfab/api-references/c/pfauthentication/pfauthentication_members.md)
- [PFAuthenticationLoginWithNintendoServiceAccountRequest](/services/playfab/api-references/c/pfauthenticationtypes/structs/pfauthenticationloginwithnintendoserviceaccountrequest.md)