Is your Stripe integration still stuck in test mode?
One of the most common things we find in a vibe-coded app: the checkout flow looks finished, but the Stripe keys are still pk_test_ / sk_test_, which means real customers can never actually pay.
How to tell if this is happening to you
- Your publishable key in the browser starts with pk_test_ instead of pk_live_
- Checkout completes with a Stripe test card (4242 4242 4242 4242) but a real card gets declined or nothing happens
- No webhook handler exists, so a successful payment never updates your database or unlocks access
- Your Stripe dashboard shows activity only in Test mode, never in Live mode, despite the app being publicly launched
Why this happens with AI-built apps specifically
AI builders wire up Stripe fast using test-mode keys by default, because that's what lets you build and demo checkout without a live business account. That's the right choice during development.
The problem is this step rarely gets revisited before launch. The founder sees a working checkout flow in the demo, assumes it's production-ready, and ships — without ever swapping in live keys, adding webhook signature verification, or testing an actual charge.
It's invisible in a walkthrough because test-mode checkout looks identical to live checkout. The only way to catch it is to check which keys are actually live in the deployed environment.
What actually fixes it
- 1. Replace all test-mode publishable and secret keys with live-mode equivalents, stored in environment variables — never hardcoded or committed to the repo
- 2. Add a webhook endpoint that verifies the Stripe signature before processing any event, so you can't be spoofed
- 3. Confirm checkout success and cancel URLs point to real, deployed pages — not localhost or a builder preview URL
- 4. Run one real, small live-mode transaction end to end and confirm it updates your database or grants access correctly
- 5. Never log full card numbers or raw customer payloads anywhere in server code
Copy-paste this into Cursor, Claude, or v0 to ship the fix:
You are moving a Stripe integration from test mode to a safe, working live mode before launch. 1. Replace all test-mode publishable and secret keys with live-mode equivalents from environment variables 2. Add a webhook handler that verifies the Stripe signature before processing any event 3. Confirm checkout success and cancel URLs point to real, deployed pages — not localhost 4. Do not log full card or customer payloads anywhere in server code Ship the diff and confirm with "stripe trigger checkout.session.completed".
stripe trigger checkout.session.completed
This is one of 43 checks in a Launch Readiness Audit.
Functional is one pillar. Search visibility, functionality, measurement, launch readiness, and the rest of trust and compliance are the other five — and most AI-built apps have gaps in more than one.