Integrate Stripe payments into any application. Framework-agnostic patterns for Node.js, Python, and other backends. Use this skill when:
(1) Setting up Stripe Checkout, Payment Intents, or embedded payment forms
(2) Implementing subscription billing with plans, trials, upgrades, or downgrades
(3) Building usage-based or metered billing (pay-per-use, credit/token systems)
(4) Handling Stripe webhooks and event processing
(5) Setting up Stripe Customer Portal for self-service billing
(6) Managing invoices, refunds, or payment disputes
(7) Implementing a credit/token purchase and consumption system
(8) Configuring Stripe API keys, webhook secrets, or test mode
(9) Any task involving Stripe payment processing, billing, or subscription management