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Guides and code for integrating major payment providers (Stripe, PayPal, Square) with backend systems: payment intents, subscriptions, webhook handling, and PCI
This skill provides practical guidance and code examples to implement payment processing using Stripe, PayPal, and Square. It covers creating payment intents, handling subscription billing, verifying and processing webhooks securely, handling refunds and disputes, and applying PCI-friendly practices. The included examples and references speed up building a production-ready payments stack and reduce common security mistakes.
Use this skill when building e-commerce platforms, SaaS billing, or any backend that must accept payments or manage recurring subscriptions. It's targeted at backend engineers who need secure, tested patterns for payment flows, webhook validation, idempotency, and sandbox testing.
scripts/ and references/ directories.Language-agnostic; examples target Python and Node.js backends. Useful for agents that can surface code snippets and security guidance to developers.
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