Authless Remote

You can run a remote MCP server hosted on Cloudflare Workers that exposes an SSE endpoint for clients to connect to. This setup lets you add tools and access them from MCP clients without requiring authentication, making it quick to prototype and demo tool integrations.

How to use

Connect to your remote MCP server from an MCP client to access tools hosted on Cloudflare. You can use the Cloudflare AI Playground to test and experiment with your server, or configure a local client to reach the remote endpoint.

How to install

Prerequisites you need before you begin: Install Node.js and npm on your machine.

Option A: Deploy via Cloudflare Workers deploy UI

1. Open the deployment flow and provide the template that creates a remote MCP server without auth. 2) Follow the prompts to name your server and deploy to a URL similar to remote-mcp-server-authless.<your-account>.workers.dev/sse.

Option B: Create the server from your local machine

1. Run the following command to scaffold the MCP server using the Cloudflare template: npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless

Additional sections

Customize your MCP server by adding tools inside the server code. In the initialization method, you can call this.server.tool(...) to register each new tool for MCP clients to discover.

Connecting to Cloudflare AI Playground is straightforward. Open the Playground, enter your deployed MCP server URL (the pattern will resemble remote-mcp-server-authless.<your-account>.workers.dev/sse), and you can run your tools directly from the playground.

If you want to run a local MCP client that talks to your remote server, configure your client to point at the remote SSE URL. For Claude Desktop, add the MCP server reference to your settings so your tools appear as available commands.

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

Available tools

calculator

A tool configured under the MCP server that proxies to a remote or local SSE endpoint via mcp-remote, enabling you to access it from MCP clients like Claude Desktop or the Cloudflare Playground.