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PopNx MCPMCP servers for people who use AI · explained in plain words

Check

by getstubversion 0.1.0i★ –iRuns on your computer
Registry namedev.getstub/check

Install

Overview

Description from the maker (original English)

Verify what an AI agent did for someone, and what commercial influence the operator disclosed.

PopNx MCP’s three pillars

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

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: Other

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: STUB_REGISTRY

You need

  • npmNode.js installed (for the npx command)

Which app do you use?

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": {
    "check": {
      "command": "npx",
      "args": [
        "-y",
        "@getstub/mcp-check"
      ],
      "env": {
        "STUB_REGISTRY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add check --env STUB_REGISTRY=your-value -- npx -y @getstub/mcp-check

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": {
    "check": {
      "command": "npx",
      "args": [
        "-y",
        "@getstub/mcp-check"
      ],
      "env": {
        "STUB_REGISTRY": "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": {
    "check": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@getstub/mcp-check"
      ],
      "env": {
        "STUB_REGISTRY": "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

  • STUB_REGISTRY env
    Registry host to resolve receipts against. Defaults to https://api.getstub.dev

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 6, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified against the domain getstub.dev (the registry checks domain ownership)

  • … 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 Otheri

  • More stars than 0% of the other 32461 servers in this category
  • Published to the registry more recently than 43% of the other 32461 servers in this category
  • Basic checks equal to or better than 100% of the other 32461 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 Check 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?

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 –, and the latest version (0.1.0) reached the registry 2 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: Spec Driven Development, Remote Desktop Commander, dotnet-mcp

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

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Remote Desktop Commander

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Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

Runs in the cloud★ 211Updated yesterday
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dotnet-mcp

by Skymly

MCP server for .NET symbols, XAML, source generators, and restricted workspace edit

Runs on your computerUpdated today
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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.

Stub recipes

Working reference integrations for Stub, the allegiance receipt registry for AI agents.

Each recipe is a runnable agent with Stub wired in at the line where the ranking picks a winner. Clone one, run it, read the receipt it produces.

Every recipe here is a reference and a simulation. No real merchants, no real money, no real users. Nobody is running these in production, and each README says so. The point is to show exactly where a receipt belongs in code you recognise.

The recipes

RecipeWhat it showsLanguage
tool-loopThe primitive every framework wraps. A model, two tools, a loop.JavaScript
acp-commerceAllegiance lives upstream of checkout, in the ranking.JavaScript
mcpA public check server any agent can add, plus the operator issuing pattern.JavaScript
langchain-pythonThe same integration inside a LangChain agent.Python
vercel-ai-sdkThe biggest agent surface in JavaScript.JavaScript
insurance-adviceThe primitive outside commerce, with real stakes.Python

Every recipe runs against the live registry and issues real receipts, under an operator id you choose. The free tier is 1,000 stubs a month, so trying all six costs nothing. There is no offline mode and no mock registry: the only way to issue a stub is to issue one.

The badge above

These recipes are exercised against the live registry every day, and the badge is drawn from the receipts that run produces. It is not a build status: it says the reference agents ranked their catalogues, disclosed what influenced the result, and issued signed records anyone can open. Click it to read them.

If it ever goes quiet, the recipes stopped working and this repo is telling you so before you clone it.

Start here

If you are new to this, read tool-loop first. It is the smallest one and it carries the lesson the others repeat: the model does nothing wrong, the ranking decided.

cd tool-loop

npm install export STUB_OPERATOR_ID=op_yourname_toolloop npm run demo

Pick an operator id that is yours. The first run registers it and saves your keypair to .stub-keys.json, which is gitignored. Every run after that uses the same identity.

The demo prints the ranking your code produced, with the reason beside each item, and then a receipt link anyone can open.

When you are ready to deploy

The recipes generate a fresh keypair each run, which is right for reading and wrong for production. PRODUCTION.md covers what changes: persisting your identity, where the receipt belongs, what never goes in the free text, and the mistakes we made taking our own agent live.

What a stub is

When your agent acts for someone, it issues a small signed record: who asked, what was done, what money moved, and what commercial influence applied. The person served checks it at a neutral registry, not on your servers and not on ours.

Here is a live one before you install anything:

https://api.getstub.dev/check/72b4baee1719ec34acc5df5c514a12fd2e19b9a6776de4b45706988f765c77d8

The integration, in full

import { Stub, influenced } from '@getstub/agent';

const stub = new Stub({ operator: 'Your Agent', declared: { paid_by: 'the user, subscription', conflicts: ['commission'], }, });

// at the line where your ranker picks a winner: const inf = []; if (pick.paid_placement) inf.push(influenced.placement(pick.seller)); if (pick.commission_pct) inf.push(influenced.commission(pick.commission_pct + '%'));

const receipt = await stub.issue({ principal: user.id, // hashed on your side, never sent raw agent: 'your-agent', requested: query, done: booked ${pick.name}, value_moved: { amount: pick.price, currency: 'USD' }, not_disclosed: inf, // an empty array is signed proof none applied });

Python is the same shape:

from getstub import Stub, influenced

Two things that keep coming up

Nobody hand writes disclosures. Your ranking code already knows when a commission or a placement fee shaped a result, because it applied it. The receipt reads the same flags at the same line. It scales the way your ranking scales.

An empty disclosure is not nothing. It is a signature saying conflicts exist in your business and none of them touched this action. That is worth more than silence, and it is why honest operators have something to gain here.

Install

npm install @getstub/agent

pip install getstub

Both clients sign over the same canonical form, verified rather than assumed: the Python test suite signs a stub and has the registry code verify it.

Free tier

1,000 stubs a month. Checking is free forever, because charging the person being served to verify would defeat the point.

Links

  • getstub.dev
  • Registry: https://api.getstub.dev
  • Witness key: https://api.getstub.dev/witness
  • Directory of operators: https://api.getstub.dev/directory

Copyright Stub 2026

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