Developers looking to build Xbox companion apps often find references to unofficial Xbox Live endpoints and community-maintained packages. The important distinction is that an endpoint visible to a consumer app is not automatically a supported public API for third-party developers.

Before building around an Xbox service, establish which access path Microsoft actually supports and whether your project is eligible to use it.

Official Xbox services access is programme-based

Microsoft's Xbox Live Services API (XSAPI) repository describes services for game developers, including profile, social, presence, achievements, multiplayer and related features. Its documentation points developers toward the Xbox Live Creators Program or ID@Xbox, and notes that the Microsoft Game Development Kit is a prerequisite for the current GDK-based setup.

Start with the official Microsoft XSAPI repository and the relevant Microsoft developer programme. Confirm current eligibility, supported platforms, SDK requirements and service permissions before committing to an implementation.

Do not assume that a consumer Xbox account grants general access to production Xbox Live services.

Treat community packages as unofficial

Third-party npm packages may wrap undocumented endpoints or reproduce authentication flows used by consumer applications. They can be useful for research, but they carry risks:

  • endpoints and authentication behaviour can change without notice;
  • a package may be abandoned or incompatible with current account security;
  • rate limits and access restrictions may not be documented;
  • the package may not have permission to provide the service your product needs;
  • use may be inconsistent with Microsoft's terms or programme requirements.

A package README is not a service contract. Inspect the source, maintenance history, licence, dependencies and authentication handling before running it with a real account.

Protect account credentials and tokens

Never ask users to paste Microsoft passwords into your application. Do not store credentials or long-lived tokens in browser storage, logs or source control. Avoid placing privileged tokens in a client-side bundle.

If an approved integration requires authentication, use the supported flow and token handling described by the relevant Microsoft documentation. Keep secrets on a trusted server where the platform design requires them, restrict access and define token expiry and revocation behaviour.

Do not build a production service around copied headers, private endpoints or reverse-engineered request sequences without confirming that the approach is permitted and stable.

Evaluate a library before depending on it

For any community library, review:

  1. Source and ownership: Is the repository public, licensed and attributable?
  2. Maintenance: Are releases, issues and security fixes recent enough for the dependency's role?
  3. Authentication: Does it use a supported flow? Does it expose credentials or tokens?
  4. Scope: Which endpoints does it call, and are they documented?
  5. Failure handling: What happens when authentication expires or a request is throttled?
  6. Terms: Does the intended use comply with the applicable platform terms?

If any of these questions cannot be answered, treat the integration as an experiment, not a production dependency.

Choose a supported route

For an Xbox game, start with Microsoft's game developer documentation and the programme appropriate to the title. For a companion app or player-facing utility, verify that the required data is available through a supported public interface before designing the product around it.

If no supported access path exists, the right engineering decision may be to reduce the feature or not build it. A fragile integration is not made production-ready by wrapping it in a TypeScript package.

Further reading