MCP Generator

What it does

MCP Generator is a developer tool that bridges the gap between standard API documentation and the Model Context Protocol. It allows developers to instantly turn any OpenAPI v3 specification (JSON or YAML) into a fully scaffolded MCP server, mapping API routes directly to AI-callable tools.

Tools

• generate: Transforms an OpenAPI spec into a TypeScript or Python project structure.
• validate: Verifies that a provided OpenAPI spec is compatible with the generator.
• init: Downloads and initializes projects from a built-in registry of popular APIs (e.g., Stripe, GitHub, Slack).
• watch: Monitors a spec file or URL and automatically regenerates the server on changes.

Installation

To generate a server, install the CLI and run:

npm install -g mcp-gen
mcp-gen generate -i spec.yaml -l typescript -o ./my-server

To connect the generated server to Claude Desktop, add this to your config:

{
  "mcpServers": {
    "my-server": {
      "command": "node",
      "args": ["/absolute/path/to/my-server/dist/server.js"]
    }
  }
}

Supported hosts

Confirmed for Claude Desktop. Generated projects can be used across any MCP-compatible client.