Agent Guard MCP

Name: Agent Guard MCP
Author: liminalpepe

by liminalpepeversion 0.2.1i★ –iRuns on your computer

Registry nameio.github.liminalpepe/agent-guard-mcp

Install

Overview

Description from the maker (original English)

Verify-before-act safety checks for AI agents: packages, lockfiles, manifests, CI workflows.

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: 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).
The registry lists no key to fill in.

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": {
    "agent-guard": {
      "command": "npx",
      "args": [
        "-y",
        "@liminallablibs/agent-guard-mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add agent-guard -- npx -y @liminallablibs/agent-guard-mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "agent-guard": {
      "command": "npx",
      "args": [
        "-y",
        "@liminallablibs/agent-guard-mcp"
      ]
    }
  }
}

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": {
    "agent-guard": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@liminallablibs/agent-guard-mcp"
      ]
    }
  }
}

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.

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 liminalpepe, 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 Otheri

More stars than 0% of the other 18333 servers in this category
Published to the registry more recently than 13% of the other 18333 servers in this category
Basic checks equal to or better than 100% of the other 18333 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 Agent Guard MCP 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 (0.2.1) reached the registry 4 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, Signoff

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

Spec Driven Development

by formulahendry

MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

Runs on your computer★ 440MITUpdated 14 months ago

Install

Remote Desktop Commander

by desktop-commander

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

Runs in the cloud★ 211Updated 2 days ago

Install

Signoff

by ayuanxx-max

Five gates that make an agent's 'done' provable: run them, read the verdict, audit the record.

Runs on your computerUpdated today

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.

agent-guard-mcp

One line: Verify-before-act safety for AI agents — check packages, lockfiles, skill manifests, and CI workflows *before* install or merge. Zero API keys. Zero config.

Scores Cursor/Claude skill manifests + GitHub Actions workflows — not just npm dependencies.

When you…	Call
`npm install foo` / agent suggests a new dep	`check_package`
Review an LLM-generated lockfile	`verify_lockfile`
Install a Cursor skill or MCP plugin	`score_manifest`
Merge a PR touching `.github/workflows/*`	`check_workflow`

Call these *before* installing a dependency, merging a CI change, or installing a third-party skill/plugin — so an agent refuses hallucinated packages, typosquats, poisoned manifests, and compromised CI actions.

Exposes four MCP tools (also available as a plain HTTP service):

Tool	Use before…	Returns
`check_package`	adding a single npm/PyPI dependency	OK / SUSPICIOUS / DANGER + typosquat/slop flags
`verify_lockfile`	running `npm/pip/yarn install`	scans every direct + transitive dep in a lockfile
`score_manifest`	installing a Cursor/Claude skill or MCP/Smithery plugin	poison-signature + scope-overreach + drift score 0–100
`check_workflow`	merging a PR that touches CI	flags mutable action pins, compromised actions, curl\	bash, pwn-requests, secret exposure

Why

AI agents routinely hallucinate package names (slopsquatting), trust LLM-generated lockfiles, install unvetted skill packs, and pin CI actions to mutable tags. Each is a live supply-chain vector. This server gives an agent a cheap "is this safe?" call before it acts.

Install (MCP client)

"mcpServers": { "agent-guard": { "command": "npx", "args": ["-y", "@liminallablibs/agent-guard-mcp@0.2.1"] } } }

Agent rule (paste into Cursor Rules / CLAUDE.md)

Before installing any npm/PyPI package, running install from a lockfile, installing a third-party skill/MCP plugin, or merging CI workflow changes, call the agent-guard MCP tools (check_package, verify_lockfile, score_manifest, check_workflow). If verdict is SUSPICIOUS, REVIEW, or BLOCK/DANGER, stop and show findings to the user — do not proceed.

Quick demo

npx -y @liminallablibs/agent-guard-mcp@0.2.1   # MCP clients spawn this via npx

HTTP mirror:

npm run http && curl "http://localhost:8402/check?name=reactt&ecosystem=npm"

→ DANGER — typosquat of "react"

Or run directly:

npm install

node src/mcp-server.mjs # stdio MCP server npm run http # optional HTTP mirror on :8402

HTTP endpoints (mirror of the MCP tools)

GET /check?name= &ecosystem=
POST /check-lockfile {lockfile_content, format} — format ∈ package-lock.json | yarn.lock | pnpm-lock.yaml | poetry.lock | requirements.txt
POST /score-manifest {manifest_type, manifest_content}
POST /check-workflow {workflow_content}

License

MIT.

Agent Guard MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

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 Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Signoff

README from the maker

agent-guard-mcp

Why

Install (MCP client)

Agent rule (paste into Cursor Rules / CLAUDE.md)

Quick demo

HTTP mirror:

→ DANGER — typosquat of "react"

HTTP endpoints (mirror of the MCP tools)

License