Express

Installation

xmcp can work on top of your existing Express project. To get started, run the following command in your project directory:

npx init-xmcp@latest

After setting up the project, your build and dev command should look like this:

{
  "scripts": {
    "dev": "xmcp dev & existing-build-command",
    "build": "xmcp build && existing-build-command"
  }
}

When running dev or build command, xmcp will bundle your tools into .xmcp/adapter.

You should add the /mcp endpoint in your existing server.

import { xmcpHandler } from "path/to/.xmcp/adapter";

app.get("/mcp", xmcpHandler);

app.post("/mcp", xmcpHandler);