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.

Get started:

This will deploy your MCP server to a URL like: remote-mcp-server-authless.<your-account>.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

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.<your-account>.workers.dev/sse)
3. You can now use your MCP tools directly from the playground!

Connect your local MCP client to this remote MCP server

To use this remote MCP server with your local MCP client, add this configuration:

{
  "mcpServers": {
    "mcp-ts-demo-cf": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://mcp-ts-demo-cf.sibebzh.workers.dev/sse"
      ],
      "disabled": false
    }
  }
}

(You can also connect to this remote MCP server from local MCP clients which only support local MCP servers via stdio, by using the mcp-remote proxy.)

Example

If all goes well, you should see the tools become available in your local MCP client and be able to do something like this:

Nice to know

- zod is used to define the schema for the arguments of the MCPServer tools.