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

Sigship

by sigshipversion 0.1.1i★ –iRuns on your computer
Registry nameio.github.sigship/sigship

Install

Overview

Description from the maker (original English)

Go/no-go check for AI-built apps. Finds production problems locally and returns fixes.

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

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": {
    "sigship": {
      "command": "npx",
      "args": [
        "-y",
        "sigship",
        "mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add sigship -- npx -y sigship mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "sigship": {
      "command": "npx",
      "args": [
        "-y",
        "sigship",
        "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": {
    "sigship": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "sigship",
        "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 sigship, 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 32545 servers in this category
  • Published to the registry more recently than 99% of the other 32545 servers in this category
  • Basic checks equal to or better than 100% of the other 32545 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 Sigship 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 (0.1.1) reached the registry today.

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, Python 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

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 yesterday
Install

Python MCP

by Files-com

Local-only Python MCP server for the Files.com API.

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.

SIGSHIP

The go/no-go check for AI-built apps. By zoof04.

SIGSHIP reads your repo on your own machine and writes the postmortem before the outage. It exits 0 only when it finds nothing serious, which gives your coding agent a real test for done.

npx sigship

No signup. No telemetry. No dependencies. Your code never leaves your machine.

What you get

SEV-1  A database table has no row level security

supabase/migrations/001_init.sql:1 Table profiles is created without row level security. Anyone with your public Supabase key can read this table. That key ships in your JavaScript.

NO-GO 1 SEV-1, 0 SEV-2, 2 SEV-3. Exit 1.

Exit codeMeaning
0GO. No SEV-1 or SEV-2 findings.
1NO-GO. Something blocks launch.
2SIGSHIP could not run.

GO means these checks found nothing that blocks launch. It does not prove the app is safe.

Use it three ways

In your terminal

npx sigship              # check this folder

npx sigship --prompt # print every fix as one prompt for your AI tool npx sigship --json # machine-readable output npx sigship --strict # also block on SEV-3

On every pull request

npx sigship init

This adds a GitHub Actions workflow and a definition of done in AGENTS.md. It never overwrites an existing file.

Inside your coding agent

Claude Code:

claude mcp add sigship -- npx -y sigship mcp

Cursor, in .cursor/mcp.json:

{ "mcpServers": { "sigship": { "command": "npx", "args": ["-y", "sigship", "mcp"] } } }

The agent gets two tools, sigship_check and sigship_explain, and an instruction not to say it is done while the verdict is NO-GO.

What it checks

SEV-1: live secrets in code, a committed .env with secrets, server secrets with browser-visible names, AI keys in the browser, missing Supabase row level security, policies that let anyone write, unverified Stripe webhooks, and user input inside SQL.

SEV-2: AI routes with no rate limit, roles stored in localStorage, and unsanitised HTML.

SEV-3: wildcard CORS, secrets in logs, no error boundary, no error tracking, no tests, and no lockfile.

SIGSHIP uses pattern checks. It can miss real problems and flag safe code. It reads code, so it can't see settings changed only in a dashboard.

License

MIT

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