PayPal Integration

About

Streamline the implementation of PayPal payments by leveraging a comprehensive guide for Express Checkout, subscription plans, and robust refund workflows. This skill provides production-ready patterns for handling both client-side Smart Payment Buttons and server-side REST API interactions. It emphasizes security through Instant Payment Notification (IPN) verification and helps developers avoid common pitfalls like duplicate transaction processing or environment mismatches, making it ideal for building reliable e-commerce checkout flows and marketplace platforms.

Key Features

• Secure Instant Payment Notification (IPN) verification
• Express Checkout and Smart Payment Button integration
• 23,139 GitHub stars
• Robust error handling and transaction idempotency patterns
• Server-side order capture and refund workflows
• Recurring billing and subscription plan management

Use Cases

• Adding a secure PayPal checkout option to an e-commerce website
• Implementing automated monthly subscription billing for SaaS products
• Developing a backend system to handle payment disputes and refunds via webhooks