Payment Integration API

advanced

A payment integration service supporting Stripe and PayPal with checkout sessions, webhook handling, refund processing, and subscription management. Includes idempotency, transaction logging, and m...

Target user

E-commerce developers who integrate payment processors

Problem

E-commerce applications need a unified payment abstraction across processors with proper webhook handling, idempotency, and transaction tracking.

Requirements

Integrate Stripe and PayPal processors
Create checkout sessions
Handle payment webhooks securely
Process refunds and partial refunds
Manage recurring subscriptions

Core technologies

TypeScript, Express, Prisma

Completion criteria

A payment service with multi-processor support, checkout, webhooks, refunds, and subscriptions.

Optional extensions

Add more payment processors
Implement fraud detection
Add invoice generation
Support split payments