Fix Your AI-Built Lemon Squeezy Integration
All-in-one payment and subscription platform for software businesses. AI tools struggle with its webhook-based architecture and overlay checkout flow.
Common Lemon Squeezy issues we find
Problems specific to AI-generated Lemon Squeezy integrations.
Webhook signature verification missing or incorrect
AI-generated handlers skip HMAC signature verification on incoming Lemon Squeezy webhooks, allowing anyone to forge subscription and order events.
Incorrect overlay checkout configuration
Generated code often misconfigures the Lemon.js overlay checkout, causing it to open in a new tab or fail to pass custom data back to your application.
License key validation not implemented server-side
AI tools frequently validate license keys on the client side only, making it trivial for users to bypass license checks entirely.
Subscription status not synced after webhook events
Generated code processes the initial subscription_created event but ignores subsequent events like subscription_updated and subscription_cancelled.
Missing variant ID mapping for plan tiers
AI tools hardcode variant IDs or confuse product IDs with variant IDs, breaking checkout when you update pricing or add new plans.
Start with a self-serve audit
Get a professional review of your Lemon Squeezy integration 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
Why does my Lemon Squeezy checkout work locally but not in production?
This usually happens because the webhook URL is still pointing to localhost, the signing secret differs between environments, or your production server's body parser is modifying the raw payload before signature verification.
How do I properly handle Lemon Squeezy subscription webhooks?
You need to handle at least five event types: subscription_created, subscription_updated, subscription_cancelled, subscription_resumed, and subscription_payment_success. AI tools typically only handle one or two of these.
Can AI tools set up Lemon Squeezy license validation correctly?
Rarely. Proper license validation requires server-side API calls to Lemon Squeezy's activation endpoint, instance tracking, and periodic re-validation. AI tools usually skip most of this and just check a boolean flag.
Related resources
Other Integrations
Need help with your Lemon Squeezy integration?
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