Does NestJS Work With Lemon Squeezy?
Yes, NestJS works excellently with Lemon Squeezy for building backend services that handle digital product sales, subscriptions, and webhook events.
Quick Facts
How NestJS Works With Lemon Squeezy
NestJS is an ideal backend framework for integrating with Lemon Squeezy's API and webhooks. You can build REST or GraphQL endpoints in NestJS that communicate with Lemon Squeezy's API to manage products, subscriptions, and customer data. The framework's modular architecture makes it easy to create dedicated modules for Lemon Squeezy operations—handling webhook validation, processing subscription events, and syncing customer information with your database. NestJS's dependency injection system works perfectly for managing Lemon Squeezy API clients and database repositories. Webhooks are straightforward to implement using NestJS controllers with proper signature verification using Lemon Squeezy's webhook signing. The developer experience is smooth: install the Lemon Squeezy SDK, create a service layer to wrap API calls, and use NestJS guards and decorators to secure webhook endpoints. Authentication can be handled via API keys stored in environment variables. One architectural consideration: store webhook event IDs in your database to prevent processing duplicate events, which can happen with retries.
Best Use Cases
Quick Setup
npm install @nestjs/common @nestjs/core reflect-metadata axios dotenvimport { Controller, Post, Body, Req, HttpException } from '@nestjs/common';
import { Request } from 'express';
import * as crypto from 'crypto';
@Controller('webhooks')
export class LemonSqueezyController {
@Post('lemon-squeezy')
async handleWebhook(@Req() req: Request, @Body() payload: any) {
const secret = process.env.LEMON_SQUEEZY_WEBHOOK_SECRET;
const signature = req.headers['x-signature'] as string;
const hmac = crypto
.createHmac('sha256', secret)
.update(JSON.stringify(payload))
.digest('hex');
if (hmac !== signature) {
throw new HttpException('Invalid signature', 401);
}
if (payload.meta.event_name === 'order:created') {
console.log('New order:', payload.data.id);
// Handle order creation
}
return { success: true };
}
}Known Issues & Gotchas
Webhook signature verification failures due to timestamp validation being too strict
Fix: Allow a reasonable time window (±300 seconds) when validating webhook timestamps, and always verify the HMAC signature independently
Rate limiting on Lemon Squeezy API not handled gracefully, causing failed requests
Fix: Implement exponential backoff retry logic and cache API responses where appropriate (product lists, customer data)
Duplicate webhook processing causing double charges or inventory issues
Fix: Store processed webhook event IDs (with expiration) and check before processing; Lemon Squeezy retries failed webhooks
Missing environment variables for API key and webhook secret in production
Fix: Use NestJS ConfigModule with validation to ensure required Lemon Squeezy credentials are present at startup
Alternatives
- •Express.js with node-lemon-squeezy SDK - lighter weight but less structured than NestJS
- •FastAPI (Python) with Lemon Squeezy API - good for rapid prototyping with async support
- •Stripe + NestJS - more mature webhook ecosystem but different tax/regional handling approach
Resources
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