Greyhack MCP Server

A Grey Hack MCP server for Cursor IDE with GitHub code search, Greybel-JS transpilation, API validation and script generation

Local serverstdioTypeScript

What is the Greyhack MCP server?

Greyhack mcp server connects Greyhack to AI assistants that speak the Model Context Protocol. A Grey Hack MCP server for Cursor IDE with GitHub code search, Greybel-JS transpilation, API validation and script generation.

What Greyhack does

A Model Context Protocol (MCP) server for Grey Hack game development, designed to work with Cursor IDE and other MCP-compatible tools.

Key capabilities

  • GitHub Code Search — Find Grey Hack code examples from GitHub repositories
  • Greybel-JS Transpilation — Convert GreyScript to JavaScript
  • GreyScript API Validation — Validate code against the official Grey Hack API
  • Script Generation — Generate template scripts for common game tasks

Tools it exposes

Once connected, the assistant can call this tool directly:

  • Prerequisites — The Prerequisites tool exposed by this server

Installing the greyhack mcp server

The server is distributed via npm as @chromewillow/greyhack-mcp-server, so most clients can run it without a manual build step. Add it to your MCP client's configuration and restart the client to pick it up — the copy-paste configs for Claude Desktop, Claude Code and Cursor are on this page.

Configuration

Before the server will start you need to supply one environment variable: GITHUB_TOKEN. Keep credentials in your client's env block or a secrets manager rather than committing them.

Requirements

  • Node.js 18+ installed - Cursor IDE or another MCP-compatible editor - GitHub API token (for code search functionality)

Where it fits

Developer-tool servers are usually the first ones people connect, because they turn "help me with this code" into an assistant that can actually read the repo and act on it. Greyhack sits in that group, and the shape of its toolset — Prerequisites — tells you what it is really for. Worth comparing against the other developer tools servers in this directory before you commit to one, since several overlap in scope but differ sharply in setup cost and permissions.

Practical notes

  • This server runs locally, so it operates with whatever access your machine and its credentials already have. Scope that deliberately rather than by default.
  • It will not start until its required credentials are present, so set those before wondering why the tools never appear.
  • Maintained by chromewillow, written in TypeScript.
  • MCP clients ask for confirmation before each tool call by default. Keep that on while you learn what the greyhack mcp server actually does with your data.
  • Every entry in this directory is reviewed by hand before it goes live, and details are checked against the project's own documentation.

Available tools

ToolWhat it does
PrerequisitesThe Prerequisites tool exposed by this server.

How to install the Greyhack MCP server

{
  "mcpServers": {
    "greyhack": {
      "command": "npx",
      "args": ["-y", "@chromewillow/greyhack-mcp-server"],
      "env": {
        "GITHUB_TOKEN": "your-value"
      }
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Configuration

  • Node.js 18+ installed - Cursor IDE or another MCP-compatible editor - GitHub API token (for code search functionality)
VariableDescriptionRequired
GITHUB_TOKENCredential the server authenticates with.Yes

Example prompts to try

  • Use Greyhack to Prerequisites.

Frequently asked questions

It connects Greyhack to MCP-compatible AI assistants such as Claude and Cursor, exposing 1 tool (Prerequisites) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Greyhack directly.