Authless Cloudflare

You can deploy and connect to a remote MCP server that runs on Cloudflare Workers, enabling tools you define to be available through MCP clients. This setup lets you run your MCP in the cloud and access it from playground clients or local MCP clients via a remote URL or a proxy, with simple, authenticated-free access for testing and lightweight workflows.

How to use

Connect to your remote MCP server from an MCP client or the Cloudflare AI Playground. Use the remote URL to access your tools directly from the cloud, or connect through a local proxy to run the server alongside your development environment. You can customize tools by defining them in your server’s init routine, and then load them into clients to execute tasks.

How to install

Prerequisites you need on your machine: Node.js (includes npm) and a modern terminal. You will also need access to a Cloudflare account to deploy a Workers-based MCP server.

# Step 1: Ensure you have Node.js and npm installed
node -v
npm -v

# Step 2: Create your MCP server project from the template
npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless

# Step 3: Navigate to the project and install dependencies
cd my-mcp-server
npm install

# Step 4: Deploy a remote MCP server capable of serving MCP tools without auth
# This will deploy to a URL resembling remote-mcp-server-authless.your-account.workers.dev/sse
# You can also customize your tools in src/index.ts within the init() method
npm run build
npm run start

Additional content and notes

Customize your MCP server by adding tools inside the init() method of your codebase, using the server’s tool registration mechanism. This enables you to expose a tailored set of capabilities to MCP clients and playgrounds.

Connect to Cloudflare AI Playground to experiment with your MCP tools in a hosted environment: open the Playground, enter your deployed MCP server URL, and start using your tools directly from the playground interface.

You can also connect from local MCP clients via the mcp-remote proxy. In Claude Desktop, configure your MCP server under Settings > Developer > Edit Config with a setup like the following, then restart Claude to enable the tools.

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