Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Description from the maker (original English)
Verify what an AI agent did for someone, and what commercial influence the operator disclosed.
These three are never merged into one score: opinions, measurements and popularity are different things.
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
Pick the AI app you use, then copy the settings.
STUB_REGISTRYYou need
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-checkFill in the empty values before running it.
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.
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.
STUB_REGISTRY envThese settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
Runs on your computer; the tool list appears in your AI app after you install it.
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
The registry name was verified against the domain getstub.dev (the registry checks domain ownership)
We have not read this repo from GitHub yet
We have not read this repo from GitHub yet
This one runs on your computer; there is no internet endpoint
Runs on your computer and uses local settings instead
Runs on your computer; we can only read tool lists from internet endpoints
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
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.
The registry does not list a required key, though some servers ask you to sign in on first use.
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).
The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 2 months ago.
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.
In the same category: Spec Driven Development, Remote Desktop Commander, dotnet-mcp
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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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.
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.
| Recipe | What it shows | Language |
|---|---|---|
tool-loop | The primitive every framework wraps. A model, two tools, a loop. | JavaScript |
acp-commerce | Allegiance lives upstream of checkout, in the ranking. | JavaScript |
mcp | A public check server any agent can add, plus the operator issuing pattern. | JavaScript |
langchain-python | The same integration inside a LangChain agent. | Python |
vercel-ai-sdk | The biggest agent surface in JavaScript. | JavaScript |
insurance-advice | The 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.
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.
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.
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.
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
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
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.
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.
1,000 stubs a month. Checking is free forever, because charging the person being served to verify would defeat the point.
Copyright Stub 2026