Stripe integration and payment services
Stripe handles payments for most SaaS apps. AI tools can scaffold basic Stripe integrations, but proper webhook handling, subscription management, and security require experienced implementation.
Common Stripe issues we find
Real problems from Stripe codebases we've reviewed.
Missing webhook signature verification
Webhook endpoints that accept any payload without verifying the Stripe signature, allowing attackers to fake payment events.
Client-side price manipulation
Prices passed from client to server instead of using Stripe Price IDs, allowing users to pay any amount they choose.
No idempotency handling
Duplicate webhook deliveries processed multiple times, causing double charges or duplicate order creation.
Missing subscription lifecycle handling
No handling for failed payments, subscription cancellations, downgrades, or payment method updates.
Stripe secret key in client code
The secret key (sk_) exposed in frontend JavaScript, giving attackers full access to your Stripe account.
No payment error handling
Payment failures show generic errors instead of actionable messages (card declined, insufficient funds, etc.).
Missing customer portal
No way for customers to update payment methods, view invoices, or manage their subscriptions without contacting support.
Test mode in production
Stripe test keys deployed to production, or production keys used in development environments.
Stripe production checklist
Key checks before deploying your Stripe app.
Webhook signatures verified on every request
Secret key (sk_) ONLY in server-side code
Prices referenced by Stripe Price ID (not amounts from client)
Idempotency keys for creating charges and subscriptions
All subscription lifecycle events handled
Customer portal configured and accessible
Proper test/production key separation
Payment error messages user-friendly and actionable
Failed payment retry and dunning email configured
Refund and dispute handling implemented
Not sure if your app passes? Our code audit ($19) checks all of these and more.
Our Stripe services
Security Review
Deep security analysis of your application — from API endpoints to database access.
Infrastructure
Databases, APIs, auth systems, email, file storage — the backend services that power your application.
Add Features
New functionality, integrations, and capabilities that your AI tool couldn't build or that you need built properly.
AI tools that generate Stripe code
Start with a self-serve audit
Get a professional review of your Stripe project at a fixed price.
Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 checks
- SSL/TLS analysis
- Security headers
- Expert review within 24h
Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerabilities
- Code quality review
- Dependency audit
- AI pattern analysis
Complete Bundle
Both scans in one package with cross-referenced findings.
- Everything in both products
- Cross-referenced findings
- Unified action plan
100% credited toward any paid service. Start with an audit, then let us fix what we find.
How it works
Tell us about your app
Share your project details and what you need help with.
Get a clear plan
We respond in 24 hours with scope, timeline, and cost.
Launch with confidence
We fix what needs fixing and stick around to help.
Frequently asked questions
Can you add Stripe to my AI-built app?
Yes. We handle the full integration — checkout flow, webhook handling, subscription management, customer portal, and billing dashboard.
Is my existing Stripe integration secure?
If it was built by an AI tool, it likely has security gaps — especially around webhook verification and key exposure. Our review checks all of this.
Can you set up subscriptions with Stripe?
Yes. We implement subscription plans, trial periods, usage-based billing, proration, and the full lifecycle (create, update, cancel, failed payments).
How do I handle Stripe webhooks properly?
We implement verified webhook endpoints that handle all relevant events idempotently — including checkout completion, subscription changes, payment failures, and disputes.
Need help with your Stripe project?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.