Auth + Billing Launch Checklist (Before First Paid User)
A concise, implementation-focused checklist for the two systems that break launches most often.
AuthBillingLaunch
Contents
If auth or billing fails, launch confidence drops immediately.
Use this checklist before opening paid access.
Authentication
- social and email flows tested end-to-end,
- protected routes verified for unauthenticated users,
- session expiry behavior validated,
- role-based access checks covered by tests.
Billing
- product IDs and webhook secrets validated,
- upgrade/downgrade states tested,
- failed payment handling confirmed,
- usage limits enforced for all plans.
Data integrity
- entitlement state is idempotent,
- webhook handlers tolerate retries,
- subscription state can be recomputed from source-of-truth events.
Recovery readiness
- manual replay path for failed webhooks
- internal script to correct user entitlement state
- support response template for billing edge cases
- automated replay tooling
- dashboard with subscription anomaly alerts
- one-click account state re-sync
When this list is complete, you can scale without fearing every checkout event.