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Groundrule MCP Server

by metricall-ai-lab Your server? Claim it
local only

Groundrule runs on your own machine — the client starts it, so there is no endpoint to ping. 878 installs a week from npm. Last commit 30 Oct 2026.

Your repository's engineering standards for coding agents: rules per file, CI check, rule proposals.

Installs per day peak 707 · avg 86 · +37% w/w
a month agotoday
878
Installs / week
npm · @groundrule/cli
1
Stars
7 open issues
30 Oct 2026
Last commit
29 releases in 90 days
Apache-2.0
License
TypeScript

What the code does

We read the source, 2 d ago · rules 995398eba69f

Evidence

Things with no honest explanation: a promise that contradicts the code, code that runs at install time while hiding what it does, data leaving the machine.

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Runs an external command packages/cli/src/platform.ts:435
      const child = spawn(command as string, args as string[], { stdio: "ignore", detached: true });

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

We found things in this code

Code changes quietly between releases, and nobody reads the diff of a dependency. We do, on every release — watch Groundrule and you get told the day something new turns up.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add groundrule -- npx -y @groundrule/cli
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "groundrule": {
      "command": "npx",
      "args": [
        "-y",
        "@groundrule/cli"
      ]
    }
  }
}
~/.codex/config.toml
[mcp_servers.groundrule]
command = "npx"
args = ["-y", "@groundrule/cli"]
.cursor/mcp.json
{
  "mcpServers": {
    "groundrule": {
      "command": "npx",
      "args": [
        "-y",
        "@groundrule/cli"
      ]
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "groundrule": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@groundrule/cli"
      ]
    }
  }
}

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Groundrule — questions

Answers built from our own checks of this server.

Why is there no uptime for Groundrule?
Groundrule runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @groundrule/cli was installed 878 times last week.
How do I connect Groundrule?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls @groundrule/cli straight from npm; nothing to host, nothing to sign up for.
How many people use Groundrule?
The npm package @groundrule/cli was installed 878 times in the last week. Week over week that is +37%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Groundrule open source?
Yes — it is published under the Apache-2.0 licence, written in TypeScript, 1 stars on GitHub and 7 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.