OAuth for SaaS Apps with Per-App Provider Control
Support Google, GitHub, and Apple OAuth across multiple apps without collapsing everything into one shared provider configuration.
OAuth gets complicated when the same company ships multiple products, each with different redirect URLs, providers, and customer expectations. 1Auth keeps provider flows centralized without pretending every app should share the same OAuth setup.
What teams need from this feature
These are the operational constraints that usually turn a simple auth flow into infrastructure work.
- OAuth credentials and redirect URLs often need to differ by product, environment, and customer context.
- State validation, PKCE, and callback handling are easy places to introduce auth bugs.
- Provider identity should stay bound to the same app boundary as the rest of the account model.
How 1Auth handles it
1Auth ships the primitive as part of one backend instead of forcing each product to rebuild the same boundary.
Per-app Google, GitHub, and Apple setup
Apps can configure their own OAuth credentials instead of inheriting one global provider connection.
Secure callback enforcement
Strict redirect matching, app-aware state validation, and provider-specific hardening keep the callback flow predictable.
OAuth inside one shared backend
OAuth accounts still sit inside the broader platform with passwordless flows, password auth, verification, and admin operations.
Good fit when
The product gets stronger when the auth model matches the boundary of the app, not the convenience of the provider.
- You want social or developer-friendly sign-in without leaking tenancy boundaries across products.
- Different apps in your portfolio already require different providers or callback behavior.
- You need OAuth to be part of a broader app-scoped auth platform, not a standalone add-on.
FAQ
Questions teams ask before they ship
Why not just share one OAuth setup across every app?
Because apps usually drift. Redirect URLs, branding, customer expectations, and security requirements tend to become app-specific over time.
Can the same provider identity be used across separate apps?
Yes, but it remains app-scoped. The same human can sign in through the same provider in multiple apps without those accounts turning into one shared global user.
Related Pages
Keep exploring the 1Auth docs cluster
Each page below connects to the same app-scoped auth model from a different buying or implementation angle.
Implement Google OAuth in FastAPI with PKCE, state validation, strict redirect matching, and app-scoped account linking.
Implement GitHub OAuth in FastAPI with safe callback handling, app-scoped provider linking, and clean session issuance.
Store OAuth provider tokens more safely with encryption at rest, app-scoped credentials, and strict callback handling.