This covers five payment providers with different strengths: SePay for Vietnamese VietQR and bank transfers, Polar for SaaS subscriptions with automated GitHub/Discord benefits, Stripe for enterprise checkout flows, Paddle for merchant-of-record subscriptions with built-in tax compliance, and Creem.io for licensing with device activation. You get webhook verification scripts, multi-provider order management patterns, and platform-specific guides for checkouts, subscriptions, and API integration. Honest take: the breadth is useful if you're comparing providers or need regional coverage, but you'll mostly use one or two of these at a time. The multi-provider order management doc is the real value if you're actually running multiple gateways.
npx skills add https://github.com/mrgoonie/claudekit-skills --skill payment-integration