Payment Integration & Billing
Integrates Stripe, PayPal, and Square to handle secure checkout flows, subscription billing, and robust webhook processing.
The Payment Integration skill equips Claude with the specialized knowledge required to implement secure and scalable financial transactions. It provides expert guidance on integrating major payment gateways like Stripe and PayPal, focusing on critical engineering requirements such as PCI compliance, webhook signature verification, and idempotency to prevent duplicate charges. Whether you are building a simple one-time checkout or a complex recurring subscription model, this skill ensures your implementation follows security best practices, handles asynchronous events reliably, and maintains a clear separation between test and production environments.