Zen

Name: Zen
Author: krystiangw

by krystiangwversion 0.1.1i★ –iRuns on your computer

Registry nameio.github.krystiangw/zen

Install

Overview

Description from the maker (original English)

Unofficial MCP server for the ZEN.com Payment Gateway: payment links, transactions, refunds.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Online shops & payments
You need to fill in: ZEN_API_KEY, ZEN_PAYWALL_SECRET, ZEN_IPN_SECRET

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: ZEN_API_KEY, ZEN_PAYWALL_SECRET, ZEN_IPN_SECRET, ZEN_ENV

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "zen": {
      "command": "npx",
      "args": [
        "-y",
        "@krystiangw/zen-mcp"
      ],
      "env": {
        "ZEN_API_KEY": "your-value",
        "ZEN_PAYWALL_SECRET": "your-value",
        "ZEN_IPN_SECRET": "your-value",
        "ZEN_ENV": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add zen --env ZEN_API_KEY=your-value --env ZEN_PAYWALL_SECRET=your-value --env ZEN_IPN_SECRET=your-value --env ZEN_ENV=your-value -- npx -y @krystiangw/zen-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "zen": {
      "command": "npx",
      "args": [
        "-y",
        "@krystiangw/zen-mcp"
      ],
      "env": {
        "ZEN_API_KEY": "your-value",
        "ZEN_PAYWALL_SECRET": "your-value",
        "ZEN_IPN_SECRET": "your-value",
        "ZEN_ENV": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "zen": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@krystiangw/zen-mcp"
      ],
      "env": {
        "ZEN_API_KEY": "your-value",
        "ZEN_PAYWALL_SECRET": "your-value",
        "ZEN_IPN_SECRET": "your-value",
        "ZEN_ENV": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

ZEN_API_KEY secret required env
ZEN Terminal API Key (Authorization header)
ZEN_PAYWALL_SECRET secret env
ZEN paywall secret for request signing (required for write ops)
ZEN_IPN_SECRET secret env
ZEN IPN secret for webhook verification
ZEN_ENV env
sandbox (default) or production

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account krystiangw, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Online shops & paymentsi

More stars than 0% of the other 1753 servers in this category
Published to the registry more recently than 28% of the other 1753 servers in this category
Basic checks equal to or better than 100% of the other 1753 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Zen safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: ZEN_API_KEY, ZEN_PAYWALL_SECRET, ZEN_IPN_SECRET

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.1) reached the registry 3 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spree Commerce: open-source B2B and marketplace ecommerce, Stripe MCP, MCP Cn Commerce

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Spree Commerce: open-source B2B and marketplace ecommerce

by spree

Open-source B2B and marketplace ecommerce; new stores include an MCP server for AI agents.

Runs in the cloud★ 15,812BSD-3-ClauseUpdated 8 days ago

Install

Stripe MCP

by stripe

Stripe’s official server lets AI view and manage customers, products, payments and invoices. Connect to Stripe’s cloud and sign in with OAuth.

Runs in the cloud★ 2,043MITUpdated 12 months ago

Install

MCP Cn Commerce

by TonyWang-hub

8 read-only MCP platform entries; support is operation-specific; merchant live acceptance pending

Runs on your computer★ 96MITUpdated 28 days ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

ZEN MCP

An MCP server that lets AI assistants work with the ZEN.com Payment Gateway: hosted payment links, transaction lookup, refunds, payouts, and reporting.

Project page

Unofficial. This project is not affiliated with, endorsed by, or maintained by ZEN.com.

What it does

Read-only tools:

List terminal payment methods and documented currencies.
Look up transactions, payment links, and payouts.
List payment links and request reconciliation reports.
Verify IPN webhook signatures locally.

Write tools:

Create hosted payment links and QR codes without handling card data.
Capture or cancel transactions and issue full or partial refunds.
Create payouts and customer records.

Disclaimer

This integration was built from public ZEN documentation without access to a live merchant account. Endpoint versions, request fields, response fields, signing details, and webhook behavior must be checked against ZEN's current OpenAPI or Postman collection before production use. Mock mode is included for evaluation without an account.

Install

Add the published package to Claude Code:

claude mcp add zen --env ZEN_API_KEY=your_terminal_api_key -- npx -y @krystiangw/zen-mcp

For Claude Desktop, add this entry to its MCP configuration:

"mcpServers": { "zen": { "command": "npx", "args": ["-y", "@krystiangw/zen-mcp"], "env": { "ZEN_API_KEY": "your_terminal_api_key", "ZEN_PAYWALL_SECRET": "your_paywall_secret", "ZEN_IPN_SECRET": "your_ipn_secret", "ZEN_ENV": "sandbox" } } } }

Configuration

Variable	Required	Description
`ZEN_API_KEY`	Outside mock mode	Terminal API Key sent in `Authorization` without a Bearer prefix
`ZEN_PAYWALL_SECRET`	Write operations	Checkout/paywall secret used to sign request bodies
`ZEN_IPN_SECRET`	Webhook verification	IPN secret used only by `verify_webhook_signature`
`ZEN_ENV`	No	`sandbox` (default) or `production`
`ZEN_BASE_URL`	No	API base URL override; takes priority over `ZEN_ENV`
`ZEN_MOCK`	No	`1` or `true` enables deterministic offline responses
`ZEN_HASH_ALG`	No	`sha224`, `sha256` (default), `sha384`, or `sha512`

In the ZEN merchant panel, go to my.zen.com → Shop settings → Terminal to find the Terminal API Key. Use sandbox first; the default API host is api.zen-test.com, although sandbox availability and onboarding requirements should be confirmed with ZEN.

No merchant account yet? You can open a ZEN business account. That is a referral link: it credits the author of this project if you sign up through it, and costs you nothing. Every other link in this README is a plain one.

Tools

Name	Type	Description
`list_payment_methods`	Read	List payment methods for the terminal
`get_transaction`	Read	Get a transaction by ZEN or merchant ID
`list_payment_links`	Read	List hosted payment links
`get_payment_link`	Read	Get one hosted payment link
`get_payout`	Read	Get a payout by ZEN ID
`download_report`	Read	Request a report download
`list_supported_currencies`	Read	List documented supported currencies
`verify_webhook_signature`	Read	Verify a ZEN IPN signature locally
`create_payment_link`	Write	Create a hosted checkout link and QR code
`refund_transaction`	Write, destructive	Issue a full or partial refund
`capture_transaction`	Write, destructive	Capture an authorized transaction
`cancel_transaction`	Write, destructive	Cancel a transaction
`create_payout`	Write, destructive	Send an outbound payout
`create_customer`	Write	Create a customer record

Security

Tools are read-only by default; operations that move or reverse money are marked destructive for MCP clients.
Secrets are read only from environment variables and are never tool arguments.
Payment acceptance uses ZEN-hosted links, so this server does not collect or transmit card numbers.
The signing algorithm follows public ZEN documentation, but nested-object and array flattening are not fully specified publicly. Verify it against the live API.
Verify every IPN webhook signature with ZEN_IPN_SECRET before trusting its contents.
Use least-privilege terminal credentials and keep human confirmation enabled for write tools.

Demo without an account

Run the server with deterministic canned API responses:

ZEN_MOCK=1 ZEN_IPN_SECRET=demo npx -y @krystiangw/zen-mcp

verify_webhook_signature does real cryptography instead of calling the API, so it needs a secret even in mock mode. Any value works for a demo.

From a development checkout:

npm install

npm run build ZEN_MOCK=1 ZEN_IPN_SECRET=demo npm run inspect

Development

Requires Node.js 18 or newer.

npm install

npm run typecheck npm run build npm test ZEN_MOCK=1 ZEN_IPN_SECRET=demo npm run inspect

Roadmap

Raw card charges only after a deliberate PCI/security design; they are excluded from the MVP.
Recurring and one-click payments after the tokenization flow is verified.
Consumer ZEN features such as cashback and personal cards if ZEN publishes a supported API.
Remote Streamable HTTP transport and OAuth after the stdio MVP.

License

MIT

Zen

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Online shops & paymentsi

Common questions

Alternatives

Spree Commerce: open-source B2B and marketplace ecommerce

Stripe MCP

MCP Cn Commerce

README from the maker

ZEN MCP

What it does

Disclaimer

Install

Configuration

Tools

Security

Demo without an account

Development

Roadmap

License