payment-integration

Name: payment-integration
Author: unclecatvn

github.com/unclecatvnDevelopment150213 installsUpdated 3w ago

About payment-integration

payment-integration is a developer skill for implementing payment processing across SePay, Polar, Stripe, Paddle, and Creem.io. It includes platform-specific references, implementation workflows, and webhook verification scripts.

Key features

01Guides for five payment platforms
02Checkout and subscription workflows
03Webhook handling and verification
04VietQR payment guidance
05Licensing and multi-provider order patterns

Use cases

01Choosing a provider for a payment integration
02Implementing subscription checkout and billing
03Verifying payment webhook events
04Managing orders across payment providers

Install

Copy the command and run it in a terminal.

$npx skills add https://github.com/unclecatvn/agent-skills --skill payment-integration

After installing, type/payment-integrationin Claude Code to confirm it loaded.

Bundled files

References and scripts installed along with SKILL.md.

README.md

references/

implementation-workflows.md

multi-provider-order-management-patterns.md

references/creem/

api.md

checkouts.md

licensing.md

overview.md

sdk.md

subscriptions.md

webhooks.md

references/paddle/

api.md

best-practices.md

overview.md

paddle-js.md

sdk.md

subscriptions.md

webhooks.md

references/polar/

benefits.md

best-practices.md

checkouts.md

overview.md

products.md

sdk.md

subscriptions.md

webhooks.md

references/sepay/

api.md

best-practices.md

overview.md

qr-codes.md

sdk.md

Details

From the project README

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

Stripe

references/stripe/stripe-best-practices.md - Integration design
references/stripe/stripe-sdks.md - Server SDKs
references/stripe/stripe-js.md - Payment Element
references/stripe/stripe-cli.md - Local testing
references/stripe/stripe-upgrade.md - Version upgrades
External: https://docs.stripe.com/llms.txt

Paddle

references/paddle/overview.md - MoR, auth, entity IDs
references/paddle/api.md - Products, prices, transactions
references/paddle/paddle-js.md - Checkout overlay/inline
references/paddle/subscriptions.md - Trials, upgrades, pause
references/paddle/webhooks.md - SHA256 verification
references/paddle/sdk.md - Node, Python, PHP, Go
references/paddle/best-practices.md - Production patterns
External: https://developer.paddle.com/llms.txt

Creem.io

references/creem/overview.md - MoR, auth, global support
references/creem/api.md - Products, checkout sessions
references/creem/checkouts.md - No-code links, storefronts
references/creem/subscriptions.md - Trials, seat-based
references/creem/licensing.md - Device activation
references/creem/webhooks.md - Signature verification
references/creem/sdk.md - Next.js, Better Auth
External: https://docs.creem.io/llms.txt

Multi-Provider

references/multi-provider-order-management-patterns.md - Unified orders, currency conversion

Scripts

scripts/sepay-webhook-verify.js - SePay webhook verification
scripts/polar-webhook-verify.js - Polar webhook verification
scripts/checkout-helper.js - Checkout session generator

Key Capabilities

Platform	Highlights
SePay	QR/bank/cards, 44+ VN banks, webhooks, 2 req/s
Polar	MoR, subscriptions, usage billing, benefits, 300 req/min
Stripe	CheckoutSessions, Billing, Connect, Payment Element
Paddle	MoR, overlay/inline checkout, Retain (churn prevention), tax
Creem.io	MoR, licensing, revenue splits, no-code checkout

Implementation

See references/implementation-workflows.md for step-by-step guides per platform.

General flow: auth → products → checkout → webhooks → events

Comments

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Details

Author: unclecatvn
Repository: unclecatvn/agent-skills
Category: Development
Installs: 213
GitHub stars: 150

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