MCPInstall

payment-integration

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

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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/unclecatvn/agent-skills --skill payment-integration
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads payment-integration automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

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

PlatformBest For
SePayVietnamese market, VND, bank transfers, VietQR
PolarGlobal SaaS, subscriptions, automated benefits (GitHub/Discord)
StripeEnterprise payments, Connect platforms, custom checkout
PaddleMoR subscriptions, global tax compliance, churn prevention
Creem.ioMoR + 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

PlatformHighlights
SePayQR/bank/cards, 44+ VN banks, webhooks, 2 req/s
PolarMoR, subscriptions, usage billing, benefits, 300 req/min
StripeCheckoutSessions, Billing, Connect, Payment Element
PaddleMoR, overlay/inline checkout, Retain (churn prevention), tax
Creem.ioMoR, 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

FAQ

What does the payment-integration skill do?

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

How do I install payment-integration?

Run npx skills add https://github.com/unclecatvn/agent-skills --skill payment-integration in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/payment-integration/ (personal) or .claude/skills/payment-integration/ (project).

Which AI agents can use payment-integration?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is payment-integration safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains payment-integration?

It is published by unclecatvn in unclecatvn/agent-skills. It has 213 recorded installs.

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