Can it handle subscription-based billing?

Yes, it includes implementation patterns for the entire subscription lifecycle, including trials, upgrades, downgrades, and automated churn prevention.

Which payment gateways does this skill support?

It supports Stripe, Paddle (MoR), Polar (SaaS), Creem.io (licensing), and SePay (Vietnamese bank transfers/VietQR).

Does it support local Vietnamese payment methods?

Yes, it provides dedicated support for SePay, enabling QR code generation and automated bank transfer verification for 44+ Vietnamese banks.

How does it handle security for webhooks?

It includes specific scripts and best practices for signature verification and idempotent event processing to prevent duplicate transactions and ensure security.

Payment Integration & Billing

Name: Payment Integration & Billing
Author: mrgoonie

bymrgoonie

•

1,691

E-commerce Solutions

Integrates diverse payment gateways including Stripe, Paddle, Polar, and SePay with production-proven implementation patterns.

About

This skill empowers Claude to architect and implement robust payment systems across a wide range of providers, from global leaders like Stripe and Paddle to niche solutions like Polar and SePay for the Vietnamese market. It provides comprehensive guidance on managing subscription lifecycles, handling secure webhooks, generating QR codes for bank transfers, and implementing Merchant of Record (MoR) solutions. Ideal for developers building SaaS platforms, e-commerce stores, or licensing-based software who need to ensure high-standard security and compliance in their checkout flows.

Key Features

End-to-end subscription lifecycle management including trials and upgrades
Secure webhook handling with automated signature verification
Software licensing and device activation implementation patterns
VietQR and NAPAS QR code generation for Vietnamese bank transfers
Multi-provider support for Stripe, Paddle, Polar, SePay, and Creem.io
1,691 GitHub stars

Use Cases

Integrating global SaaS billing with Paddle or Polar for automated tax compliance
Automating Vietnamese bank transfer reconciliation via SePay and VietQR
Building unified order management systems that support multiple payment providers

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add mrgoonie/claudekit-skills payment-integration

For use in Claude.ai and ChatGPT

Download Skill

GitHub