# Payment Integration

Integrate payments with SePay (VietQR), Polar, Stripe, Paddle (MoR subscriptions)...

- Repository: https://github.com/mrgoonie/claudekit-skills (2229 stars)
- Category: Engineering
- License: MIT
- Last updated: 2026-04-03
- Runs scripts: yes, review before use

## Install

Claude Code: `npx skills add mrgoonie/claudekit-skills --skill payment-integration -g -a claude-code -y`
Codex: `npx skills add mrgoonie/claudekit-skills --skill payment-integration -g -a codex -y`
Cursor: `npx skills add mrgoonie/claudekit-skills --skill payment-integration -g -a cursor -y`
Gemini CLI: `npx skills add mrgoonie/claudekit-skills --skill payment-integration -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add mrgoonie/claudekit-skills`

## Description

Integrate payments with SePay (VietQR), Polar, Stripe, Paddle (MoR subscriptions), Creem.io (licensing). Checkout, webhooks, subscriptions, QR codes, multi-provider orders.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Payment Integration

Production-proven payment processing with SePay (Vietnamese banks), Polar (global SaaS), Stripe (global infrastructure), Paddle (MoR subscriptions), and Creem.io (MoR + licensing).

## When to Use

- Payment gateway integration (checkout, processing)
- Subscription management (trials, upgrades, billing)
- Webhook handling (notifications, idempotency)
- QR code payments (VietQR, NAPAS)
- Software licensing (device activation)
- Multi-provider order management
- Revenue splits and commissions

## Platform Selection

| Platform | Best For |
|----------|----------|
| **SePay** | Vietnamese market, VND, bank transfers, VietQR |
| **Polar** | Global SaaS, subscriptions, automated benefits (GitHub/Discord) |
| **Stripe** | Enterprise payments, Connect platforms, custom checkout |
| **Paddle** | MoR subscriptions, global tax compliance, churn prevention |
| **Creem.io** | MoR + licensing, revenue splits, no-code checkout |

## Quick Reference

### SePay
- `references/sepay/overview.md` - Auth, supported banks
- `references/sepay/api.md` - Endpoints, transactions
- `references/sepay/webhooks.md` - Setup, verification
- `references/sepay/sdk.md` - Node.js, PHP, Laravel
- `references/sepay/qr-codes.md` - VietQR generation
- `references/sepay/best-practices.md` - Production patterns

### Polar
- `references/polar/overview.md` - Auth, MoR concept
- `references/polar/products.md` - Pricing models
- `references/polar/checkouts.md` - Checkout flows
- `references/polar/subscriptions.md` - Lifecycle management
- `references/polar/webhooks.md` - Event handling
- `references/polar/benefits.md` - Automated delivery
- `references/polar/sdk.md` - Multi-language SDKs
- `references/polar/best-practices.md` - Production patterns

The rest: https://github.com/mrgoonie/claudekit-skills/blob/HEAD/.claude/skills/payment-integration/SKILL.md