Building a Remote MCP Server on Cloudflare (Without Auth)

This guide explains how to run a remote MCP server on Cloudflare Workers that can be accessed without authentication and used from MCP clients. It covers how to deploy the server, connect from an MCP client like the Cloudflare AI Playground, and link local clients through a remote proxy to access your tools quickly and securely.

How to use

You can connect to your remote MCP server from MCP clients to access tools directly. Use the Cloudflare AI Playground to interact with your server from a web-based client, or configure a local client to reach your remote server through a proxy.

Connect from the Cloudflare AI Playground by visiting the Playground and entering your deployed server URL. This lets you experiment with your MCP tools in a ready-made remote environment.

Connect Claude Desktop to your MCP server using the mcp-remote proxy. Within Claude Desktop, open Settings > Developer > Edit Config and add the following configuration for tools you want to expose from your remote server.

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

Available tools

mcp-remote

A client proxy that enables local MCP clients to connect to a remote MCP server over HTTP-SSE.