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Groundtruth MCP Server

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Groundtruth runs on your own machine — the client starts it, so there is no endpoint to ping. 355 installs a week from npm. Last commit 11 Oct 2026.

Live docs MCP server. 793+ libraries, evidence-verified answers, code audit, snippets, dispatch.

Installs per day peak 346 · avg 47 · +173% w/w
a month agotoday
355
Installs / week
npm · @groundtruth-mcp/gt-mcp
6
Stars
1 open issue
11 Oct 2026
Last commit
3 releases in 90 days
Elastic-2.0
License
TypeScript

What the code does

We read the source, 1 d ago · rules 995398eba69f

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 a command on install [пакет] package.json:1
postinstall: node postinstall.mjs

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

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

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 groundtruth -- npx -y @groundtruth-mcp/gt-mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "groundtruth": {
      "command": "npx",
      "args": [
        "-y",
        "@groundtruth-mcp/gt-mcp"
      ]
    }
  }
}
~/.codex/config.toml
[mcp_servers.groundtruth]
command = "npx"
args = ["-y", "@groundtruth-mcp/gt-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "groundtruth": {
      "command": "npx",
      "args": [
        "-y",
        "@groundtruth-mcp/gt-mcp"
      ]
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "groundtruth": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@groundtruth-mcp/gt-mcp"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: GT_GITHUB_TOKEN (GitHub API token for higher rate limits (raises from 60 to 5000 req/hr)), GT_CACHE_DIR (Disk cache directory (default ~/.gt-mcp-cache)), GT_LOG_LEVEL (Log level written to stderr: debug, info, warn or error (default info)).

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Groundtruth — questions

Answers built from our own checks of this server.

Why is there no uptime for Groundtruth?
Groundtruth 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 @groundtruth-mcp/gt-mcp was installed 355 times last week.
How do I connect Groundtruth?
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 @groundtruth-mcp/gt-mcp straight from npm; nothing to host, nothing to sign up for.
How many people use Groundtruth?
The npm package @groundtruth-mcp/gt-mcp was installed 355 times in the last week. Week over week that is +173%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Groundtruth open source?
No, and the distinction matters: its licence is declared as Elastic-2.0. That makes it source-available — you can read the code, but the terms are the author's own, not one of the recognised open-source licences. Read them before you build on it.