Building a Remote MCP Server on Cloudflare (Without Auth)

This example allows you to deploy a remote MCP server that doesn't require authentication on Cloudflare Workers. The server includes tools for website analysis and content extraction using Cloudflare's Browser Rendering and AI capabilities.

Get started:

This will deploy your MCP server to a URL like: remote-mcp-server-authless..workers.dev/sse

Alternatively, you can use the command line below to get the remote MCP Server created on your local machine:

npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless

Available Tools

Website Analysis Tools

1. analyze_website

   • Scrapes and analyzes a website using Cloudflare's browser rendering
   • Uses Cloudflare AI to provide a summary of the website's content
   • Input: url (string) - The website URL to analyze
   • Example: [tool] analyze_website(url: "https://example.com")

2. ask_q_about_website

   • Scrapes a website and answers specific questions about its content
   • Uses Cloudflare AI to understand and respond to questions about the website
   • Inputs:
     • url (string) - The website URL to analyze
     • question (string) - Your question about the website content
   • Example: [tool] ask_q_about_website(url: "https://example.com", question: "What services does this company offer?")

Customizing your MCP Server

To add your own tools to the MCP server, define each tool inside the init() method of src/index.ts using this.server.tool(...).

Connect to Cloudflare AI Playground

You can connect to your MCP server from the Cloudflare AI Playground, which is a remote MCP client:

1. Go to https://playground.ai.cloudflare.com/
2. Enter your deployed MCP server URL (remote-mcp-server-authless..workers.dev/sse)
3. You can now use your MCP tools directly from the playground!

Connect Claude Desktop to your MCP server

You can also connect to your remote MCP server from local MCP clients, by using the mcp-remote proxy.

To connect to your MCP server from Claude Desktop, follow Anthropic's Quickstart and within Claude Desktop go to Settings > Developer > Edit Config.

Update with this configuration:

{
  "mcpServers": {
    "calculator": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "http://localhost:8787/sse"  // or remote-mcp-server-authless.your-account.workers.dev/sse
      ]
    }
  }
}

Restart Claude and you should see the tools become available.

Requirements

To use the website analysis tools, you need:

1. Cloudflare Workers with browser binding enabled
2. Cloudflare AI binding configured
3. Appropriate permissions for both bindings

Make sure your wrangler.jsonc includes:

{
  "browser": {
    "binding": "BROWSER"
  },
  "ai": {
    "binding": "AI"
  }
}