Does Fastify Work With Stripe?
Fastify works seamlessly with Stripe for building high-performance payment processing APIs.
Quick Facts
How Fastify Works With Stripe
Fastify and Stripe integrate naturally because Stripe provides a well-designed Node.js SDK that works with any HTTP framework. You install the `stripe` npm package, initialize it with your API key, and use it within Fastify route handlers to process payments, manage subscriptions, and handle webhooks. The integration pattern is straightforward: define routes for checkout, payment confirmation, and webhook endpoints that verify Stripe's signatures. Fastify's lightweight nature and fast request handling make it particularly suited for payment processing, where low latency matters. The main architectural consideration is webhook handling—Fastify's async/await support makes it easy to implement idempotent webhook handlers that safely process Stripe events even if they're retried. You'll typically store webhook events in a database to prevent duplicate processing and maintain audit trails for compliance.
Best Use Cases
Quick Setup
npm install fastify stripeimport Fastify from 'fastify';
import Stripe from 'stripe';
const fastify = Fastify();
const stripe = new Stripe(process.env.STRIPE_SECRET_KEY!);
fastify.post('/create-payment-intent', async (request, reply) => {
const { amount } = request.body as { amount: number };
const paymentIntent = await stripe.paymentIntents.create({
amount,
currency: 'usd',
});
return { clientSecret: paymentIntent.client_secret };
});
fastify.post('/webhook', async (request, reply) => {
const sig = request.headers['stripe-signature'] as string;
const event = stripe.webhooks.constructEvent(
request.rawBody,
sig,
process.env.STRIPE_WEBHOOK_SECRET!
);
if (event.type === 'payment_intent.succeeded') {
console.log('Payment succeeded:', event.data.object.id);
}
return { received: true };
});
fastify.listen({ port: 3000 });Known Issues & Gotchas
Webhook signature verification fails silently if you don't parse raw request body correctly
Fix: Use Fastify's rawBody plugin or access req.rawBody directly. Stripe's verification requires the exact bytes, not parsed JSON.
Idempotency keys aren't automatically generated for retried requests
Fix: Implement idempotency key logic in your handlers using stored request fingerprints, or always include idempotencyKey in Stripe API calls for mutation operations.
Rate limiting can interfere with Stripe webhook retries
Fix: Whitelist Stripe's IP ranges or use a separate rate limit for webhook endpoints.
Alternatives
- •Express.js + Stripe (more mature ecosystem, larger community)
- •Next.js API Routes + Stripe (better for full-stack JavaScript applications)
- •AWS Lambda + Stripe (serverless payment processing)
Resources
Related Compatibility Guides
Explore more compatibility guides