Remote MCP Server Authless

You can run a remote MCP server on Cloudflare Workers that serves MCP tools without requiring authentication. This enables you to connect from MCP clients or the Cloudflare AI Playground, and you can customize the server to add your own tools for quick access and testing.

How to use

Connect from an MCP client to your remote server using its public URL. The server exposes an SSE endpoint that MCP clients communicate with to discover and run your tools. You can also connect from the Cloudflare AI Playground by entering your deployed server URL, then use your MCP tools directly from the playground. For local testing or development workflows, you can point a local MCP client at the server’s SSE URL and start issuing tool commands as you would with any other MCP server.

How to install

Prerequisites you need to have installed on your machine before creating and running the server:

Steps

# Prerequisites
node -v
npm -v

# Create the remote MCP server project using the Cloudflare template
npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless

# The process creates a project you can deploy to Cloudflare Workers
# Follow the prompts to finish the setup as guided by the tool

Customizing your MCP server

To add your own tools, open the project and define each tool inside the init() method of src/index.ts using this.server.tool(...). This lets you expose new capabilities to MCP clients without altering the core server architecture.

Connect from Claude Desktop to your MCP server

You can connect Claude Desktop to your remote MCP server by configuring the remote endpoint in Claude Desktop’s settings. Use the standard mcp-remote pattern to route requests to your server’s SSE URL.

Connect to Cloudflare AI Playground

Open the Cloudflare AI Playground and enter your deployed MCP server URL to connect. Once connected, you can use your MCP tools directly from the playground.