Solution
Add payments to AI app — that actually work in production.
AI builders can wire a Stripe checkout button in minutes. But a payment integration is 10% checkout and 90% everything that happens after the user pays. Here's what's missing.
Quick verdict
What a complete Stripe integration covers: checkout session creation, all 8 webhook events wired and verified, subscription state synced to your database, customer portal enabled, and idempotency on every handler. 8 webhook events most AI apps never handle.
Related pages
This is the outcome-framed commercial page for adding Stripe to an AI-built app. If you’re looking for a specific resource:
- Technical depth (tool-agnostic): Stripe webhook not firing · Stripe stuck in test mode in production · Stripe checkout session expired.
- Tool-specific diagnostic pages: Lovable Stripe integration · Bolt Stripe integration · v0 Stripe integration · Replit Stripe integration · Base44 Stripe integration.
- Vendor-stack page: Stripe integration fix (vendor stack).
- Pre-flight checklists: Lovable checklist · Bolt checklist.
What's missing from AI-built Stripe integrations
01
Checkout button but no subscription logic
Stripe Checkout creates the subscription. But failed payments, dunning, proration, upgrades, and cancellations weren't built.
02
Webhooks not verified
The webhook endpoint exists but doesn't verify the Stripe signature. Anyone can POST to it and change subscription state.
03
Missing events: invoice.payment_failed
When Stripe fails to charge, your app doesn't know. The user keeps their premium access. You lose the revenue.
04
Missing events: customer.subscription.deleted
When a user cancels or is churned by Stripe, your app doesn't revoke access. Cancelled users stay on premium indefinitely.
05
No idempotency on webhook handlers
Stripe delivers webhooks at least once. Without idempotency keys, a duplicate delivery creates duplicate state — double credits, double access grants.
06
Stripe test mode in production
The environment variable was never switched from sk_test_ to sk_live_. Real users are hitting test mode Stripe.
07
No customer portal
Users can't update their card, view invoices, or cancel. They email you. You manually cancel in Stripe.
FAQ
What webhook events do you wire up?
The 8 events that matter: checkout.session.completed, invoice.paid, invoice.payment_failed, invoice.payment_action_required, customer.subscription.updated, customer.subscription.deleted, customer.subscription.trial_ending_soon, and payment_intent.payment_failed.
Can you add payments to any AI-built app?
Yes — Lovable, Bolt, v0, Cursor, Windsurf, Replit, Base44. If it runs JavaScript and has a backend (or we can add one), we can wire Stripe.
My checkout button already works. Why do I need more?
Checkout is 10% of a payment integration. The other 90% is what happens after: failed payments, cancellations, proration, upgrades, refunds, disputes. None of those are in the checkout flow.
How long does a full Stripe integration take?
3–5 days for a standard subscription + customer portal. Add 1–2 days for usage-based billing or multi-tier plans.
Do you handle the Stripe dashboard setup too?
Yes. We configure the product catalog, prices, webhook endpoints, customer portal settings, and tax handling.
What does this cost?
Integration Fix is $799. That covers one broken integration end-to-end — including the webhook handler, subscription state sync, and customer portal. Free audit first.
Next step
Free payments audit
We review your existing Stripe code, identify every missing webhook and gap, and tell you exactly what it'll take to fix. No cost, no commitment.
Book free diagnostic →