npx create-cloudflare@latest my-mcp-worker
cd my-mcp-worker

wrangler login

name = "my-mcp-worker"
main = "src/index.ts"
compatibility_date = "2025-03-03"
account_id = "your-account-id"

npm install workers-mcp

npx workers-mcp setup

import { WorkerEntrypoint } from 'cloudflare:workers';
import { ProxyToSelf } from 'workers-mcp';

export default class MyWorker extends WorkerEntrypoint<Env> {
  /**
   * A friendly greeting from your MCP server.
   * @param name {string} The name of the user.
   * @return {string} A personalized greeting.
   */
  sayHello(name: string) {
    return `Hello from an MCP Worker, ${name}!`;
  }

  /**
   * @ignore
   */
  async fetch(request: Request): Promise<Response> {
    return new ProxyToSelf(this).fetch(request);
  }
}

export default class WeatherWorker extends WorkerEntrypoint<Env> {
  /**
   * Fetch weather data for a given location.
   * @param location {string} The city or ZIP code.
   * @return {object} Weather details.
   */
  async getWeather(location: string) {
    const response = await fetch(`https://api.weather.example/v1/${location}`);
    const data = await response.json();
    return {
      temperature: data.temp,
      conditions: data.conditions,
      forecast: data.forecast
    };
  }

  async fetch(request: Request): Promise<Response> {
    return new ProxyToSelf(this).fetch(request);
  }
}

npx wrangler deploy

npm run deploy

npx workers-mcp proxy

npx wrangler secret put MCP_SECRET