Remote MCP Server Authless

You set up a remote MCP server that runs on Cloudflare Workers and serves as an interface for your tools over server-sent events (SSE). This lets you access and run your MCP tools from various clients without managing a centralized backend yourself. It’s useful for quickly prototyping, sharing tools across environments, and running lightweight MCP deployments in the cloud.

How to use

You can interact with your MCP server from any compatible MCP client. Deploying to Cloudflare creates a public URL that your clients can connect to, and you can then access and execute your tools through that endpoint. For example, you can connect via a playground client or configure local clients to point at the remote server, enabling you to run your tools remotely without hosting your own SSE server.

How to install

Prerequisites: You need Node.js installed on your machine. You may also want access to a Cloudflare account if you are deploying to Cloudflare Workers.

# Install the Cloudflare MCP template locally (example)
npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless

Additional sections

To customize your MCP server, you define each tool inside the init() method of src/index.ts using this.server.tool(...). This is where you add the specific capabilities your MCP server will expose to clients.

Connect to Cloudflare AI Playground to test and use your MCP server directly from the playground client. Open the playground and enter your deployed MCP server URL to start using your tools from the playground environment.

You can also connect to your remote MCP server from local MCP clients using the mcp-remote proxy. In Claude Desktop, navigate to Settings > Developer > Edit Config and set the MCP server connection like this: the calculator server example shows how to wire the remote URL into your local client configuration, allowing you to access your tools from your desktop environment.