Test Card Hub

Name: Test Card Hub
Author: eyrockscript

by eyrockscriptversion 1.1.0i★ 2 (Stars for the whole repo)iRuns on your computer

Registry nameio.github.eyrockscript/test-card-hub

How to install

What it does

Sandbox test cards, Playwright tests, real-card scanner and decline codes for LATAM gateways.

Connects Runs on your computer
Account or key No key needed
Category Developer tools

Install

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

Passed 3/3 checks · Runs on your computer · ✓ Commands checked Nov 14, 2026

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude, with some setup first

Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "test-card-hub": {
      "command": "npx",
      "args": [
        "-y",
        "test-card-hub-mcp"
      ]
    }
  }
}

Done

Quit Claude and open it again
Done
Try it
Use Test Card Hub and tell me what you can do for me, then show me one thing
✓ If Claude says it is using Test Card Hub or shows a Test Card Hub tool in the answer, you are connected

1 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

TEST_CARD_HUB_BACKUP Optional path to the backup JSON exported from the Test Card Hub Chrome extension, to expose your own environments.

Descriptions are as written by the maker.

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect Test Card Hub yet

Test Card Hub runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect Test Card Hub

Steps for Claude →Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →Install Node.js on your computer first (one time)
Steps for Cursor →Install Node.js on your computer first (one time)
Steps for VS Code →Install Node.js on your computer first (one time)

B · Others in Developer tools that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Sentry✓ ChatGPT
Compiler Explorer✓ ChatGPT
GitDiagram✓ ChatGPT

Works with Claude Code, with some setup first

Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done

Paste this command and press Enter

claude mcp add --scope user test-card-hub -- npx -y test-card-hub-mcp

Done

Type /mcp in Claude Code
You should see Test Card Hub listed as connected
Done
Try it
Use Test Card Hub and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using Test Card Hub or shows a Test Card Hub tool in the answer, you are connected

1 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

TEST_CARD_HUB_BACKUP Optional path to the backup JSON exported from the Test Card Hub Chrome extension, to expose your own environments.

Descriptions are as written by the maker.

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor, with some setup first

Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use Test Card Hub and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using Test Card Hub or shows a Test Card Hub tool in the answer, you are connected

1 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

TEST_CARD_HUB_BACKUP Optional path to the backup JSON exported from the Test Card Hub Chrome extension, to expose your own environments.

Descriptions are as written by the maker.

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code, with some setup first

Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use Test Card Hub and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using Test Card Hub or shows a Test Card Hub tool in the answer, you are connected

1 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

TEST_CARD_HUB_BACKUP Optional path to the backup JSON exported from the Test Card Hub Chrome extension, to expose your own environments.

Descriptions are as written by the maker.

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

JSON settings are under “For developers” below

Stuck? Ask people who use Test Card Hub💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add --scope user test-card-hub -- npx -y test-card-hub-mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "test-card-hub": {
      "command": "npx",
      "args": [
        "-y",
        "test-card-hub-mcp"
      ]
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "test-card-hub": {
      "command": "npx",
      "args": [
        "-y",
        "test-card-hub-mcp"
      ]
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "test-card-hub": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "test-card-hub-mcp"
      ]
    }
  }
}

Values you fill in

TEST_CARD_HUB_BACKUP env
Optional path to the backup JSON exported from the Test Card Hub Chrome extension, to expose your own environments.

Descriptions are as written by the maker.

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

At a glance

GitHub stars i: 2 (Stars for the whole repo)
This repo holds several MCP listings; its stars count once in rankings
Downloads per weeki: Not on npm/PyPI
Licence i: MIT
Connection: Runs on your computer
Transport: stdio
Latest versioni: 1.1.0
Categoryi: Developer tools
Published to registryi: Nov 11, 2026
Code last changedi: Nov 13, 2026
Maker: eyrockscript
Packages: npm: test-card-hub-mcp
Repo: eyrockscript/test-card-hub
Website: github.com
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

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 14, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account eyrockscript, which owns the repo
✓ Pass
Still maintained
Code last changed yesterday
✓ Pass
Has a licence
Uses MIT
– 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

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Developer toolsi

More stars than 0% of the other 5869 servers in this category
Published to the registry more recently than 92% of the other 5869 servers in this category
Basic checks equal to or better than 100% of the other 5869 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 Test Card Hub safe?

It passed 3 of 3 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?

The registry does not list a required key, though some servers ask you to sign in on first use.

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 yesterday, and the latest version (1.1.0) reached the registry 3 days 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: REA, GitHub, Serena MCP: the IDE for your agent

Others in the same category

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

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

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GitHub

GitHub’s official server lets AI read and manage code, issues and pull requests in your account. Use GitHub’s hosted version or run it locally with Docker.

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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.

test-card-hub-mcp

MCP server that gives AI agents the official sandbox test cards of Latin American and global payment gateways, so they can test a checkout end to end: approved, declined, insufficient funds and 3DS/review scenarios.

Companion to the Test Card Hub Chrome extension. Same data, same validation code.

Gateways: Stripe, Mercado Pago MX, Conekta, Openpay MX, NetPay MX, Clip, Kushki MX, PayU Latam MX, dLocal and Adyen. Every number is copied from the gateway's official documentation, with the URL and verification date (sources).

Test environments only. The server never generates card numbers and never calls a gateway.

Install

Claude Code:

claude mcp add test-card-hub -- pnpm dlx test-card-hub-mcp

Claude Desktop, Cursor and other clients (mcpServers config):

"mcpServers": { "test-card-hub": { "command": "pnpm", "args": ["dlx", "test-card-hub-mcp"] } } }

npx -y test-card-hub-mcp works too. Requires Node.js 20 or newer.

Desktop apps (Claude Desktop, Cursor) do not load your shell profile. If Node.js comes from nvm, fnm or asdf, the app cannot find node and the server fails with env: node: No such file or directory. Pass your Node.js bin directory in env.PATH (find it with dirname "$(which node)"):

"mcpServers": { "test-card-hub": { "command": "pnpm", "args": ["dlx", "test-card-hub-mcp"], "env": { "PATH": "/Users/you/.nvm/versions/node/v22.23.4/bin:/usr/local/bin:/opt/homebrew/bin:/usr/bin:/bin" } } } }

Tools

Tool	What it does
`list_gateways`	Gateways with docs URL, verification date, card count per outcome and the gateway hint (expiry, CVV, cardholder-name rules).
`find_test_cards`	Cards filtered by `gateway`, `outcome`, `brand`, `environment` or `source`. Each card includes everything to type in the checkout: expiry, CVV, postal code, and the fields some sandboxes need, such as the NetPay customer email or the Mercado Pago, PayU and Adyen cardholder name. Max 50 per call; the response says how many matched.
`validate_card`	Luhn, length, brand and whether the number is a known test number. Verdict `possibly_real_card` tells the agent to stop.
`list_environments`	Your own environments from the extension, read from an exported backup file.
`generate_checkout_tests`	Writes a Playwright test file (TypeScript) with one test per sandbox scenario of a gateway, with every field filled from the official rules. Map the `fillCheckout` and `expectOutcome` helpers to your checkout's selectors. The server returns the file; it writes nothing to disk.
`scan_for_real_cards`	Scans text (code, fixtures, logs, seed data) for card numbers that may be real: Luhn-valid, a known brand, and not a published sandbox number. Findings are masked to first 6 + last 4 digits (last 4 only for numbers under 16 digits), with line and column. Numbers split across lines or separated by dots are not detected. Up to 200,000 characters per call.
`explain_decline`	Explains a gateway decline or error code: the official meaning with its source URL, plus a suggested customer message (es/en) and merchant action. The suggestions are ours and labelled as such. Omit `code` to list a gateway's known codes.

All tools are read-only. Descriptions accept lang: "es" for Spanish texts.

Where the data comes from

Card numbers come from each gateway's official test-card page. Field rules (expiry, CVV, cardholder name, email) and decline codes come from the official docs listed in src/data/gateway-research/ .json, each with its sources, verifiedAt date and gaps: what the docs did not state. Every scenario says where each value came from (fieldSources: gateway_docs, any_future_date or any_value). Decline categories (insufficient_funds, fraud_suspected, ...) are our classification; gateways do not publish them.

Known gaps on 2026-11-10: Kushki's docs are behind a password, so explain_decline has no Kushki codes and its field rules could not be re-verified. Gateways do not document which decline code each sandbox scenario returns, so generate_checkout_tests checks the outcome shown to the customer, not a specific code.

Prompt checkout_test_matrix (checkoutUrl, gateway): runs every outcome against your checkout with a browser tool such as Playwright MCP and returns a pass/fail table.

Use with Playwright MCP

claude mcp add playwright -- pnpm dlx @playwright/mcp@latest

claude mcp add test-card-hub -- pnpm dlx test-card-hub-mcp

Then ask: "Test the checkout at http://localhost:3000/pay with Conekta: approved, declined and insufficient funds."

Your own environments

In the extension, open "Manage environments" and click "Export backup".
Start the server with the file path:

claude mcp add test-card-hub -- pnpm dlx test-card-hub-mcp --backup /path/to/test-card-hub-backup.json

Or set TEST_CARD_HUB_BACKUP=/path/to/file.json. The file is re-read on every call, so a new export is picked up without restarting. The path comes only from server configuration, never from a tool argument.

Español

Servidor MCP con las tarjetas de prueba oficiales de pasarelas de pago (Stripe, Mercado Pago, Conekta, Openpay, NetPay, Clip, Kushki, PayU, dLocal, Adyen) para que un agente de IA pruebe un checkout de punta a punta. Instalación en Claude Code:

claude mcp add test-card-hub -- pnpm dlx test-card-hub-mcp

Usa lang: "es" para recibir descripciones y notas en español. Para tus propios ambientes, exporta el respaldo desde la extensión y pasa la ruta con --backup.

Development

pnpm install

pnpm --filter test-card-hub-mcp test:coverage

src/domain, src/data and src/ui/view-model.js of the extension are copied into mcp/core by scripts/sync-core.mjs before tests and before packing. Do not edit mcp/core.

Made by Cenzontle. MIT license.

Test Card Hub

What it does

Install

Install Node.js

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install Node.js

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js

Click this button to open Cursor

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js

Click this button to open VS Code

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

Values you fill in

At a glance

Which apps can use it

Related guides

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

Discussion

User reviews

Compared with others in Developer toolsi

Common questions

Others in the same category

REA

GitHub

Serena MCP: the IDE for your agent

README from the maker

test-card-hub-mcp

Install

Tools

Where the data comes from

Use with Playwright MCP

Your own environments

Español

Development