Ck:Payment Integration

Community

manhvann

ck:payment-integration

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

Overview

Publisher	manhvann
Repository	`codexkit`
Skill name	`ck:payment-integration`
Stars	88
Forks	81
Bundled files	40
License	MIT
Links	Skill source Repository

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
40 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by manhvann on GitHub. Read the source before you install it.

Installation

Install the Ck:Payment Integration AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/manhvann/codexkit/tree/main/.agents/skills/payment-integration
Enable the skill in any chat where you want it available.

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/manhvann/codexkit.git /tmp/codexkit
mkdir -p .claude/skills
cp -r /tmp/codexkit/.agents/skills/payment-integration .claude/skills/manhvann-ck-payment-integration

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Ck:Payment Integration in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Ck:Payment Integration on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Ck:Payment Integration is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

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

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Ck:Payment Integration AI skill do?

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

Why use Ck:Payment Integration on TypingMind?

Because you install it once and use it with any model. Ck:Payment Integration is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Ck:Payment Integration in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/manhvann/codexkit/tree/main/.agents/skills/payment-integration. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Ck:Payment Integration?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Ck:Payment Integration?

As many as you like. As long as a model supports skills, you can use Ck:Payment Integration with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Ck:Payment Integration AI skill free?

Yes. It is published on GitHub by manhvann under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Payment Integration

When to Use

Platform Selection

Quick Reference

SePay

Polar

Stripe

Paddle

Creem.io

Multi-Provider

Scripts

Key Capabilities

Implementation

Bundled files

Frequently asked questions

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