Remote

You can deploy a remote MCP Server on Cloudflare Workers that doesn’t require authentication and then connect MCP clients to run and test tools locally or remotely. This enables you to expose a small, customizable set of MCP tools over the web and integrate them with clients like the AI Playground or Claude Desktop.

How to use

Connect to your remote MCP server from an MCP client or playground to start using your tools. You can invoke tools defined on the server and compose prompts that leverage the remote capabilities.

Connect via the Cloudflare AI Playground to experiment with your MCP server. Open the Playground and enter your deployed MCP server URL to load the available tools. Then you can run and test tools directly in the playground environment.

Connect Claude Desktop to your remote MCP server to use tools from your local environment. You can configure Claude Desktop to point at the MCP server URL and have Claude route requests to the server through the mcp-remote proxy.

How to install

Prerequisites you need before starting are Node.js (with npm) for the local tooling and a Cloudflare Workers account if you plan to deploy a remote MCP server.

Install the deployment tool and create your remote MCP server using the provided template.

If you already have a project directory, you can bootstrap a new server with the Cloudflare template.

Configuration and usage notes

To add your own tools, define each tool inside the init() method of your server’s entry file using this.server.tool(...). This is how you expose custom capabilities to clients.

The following configuration shows how a client can connect to a remote MCP server via the standard mcp-remote proxy. You can adapt this to your own environment and server URL.

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

Usage examples and notes

If you deploy a remote MCP server on Cloudflare, you will receive a URL like remote-mcp-server-authless.<your-account>.workers.dev/sse. You can point clients at this URL to start using the tools you defined on the server.

From a local client, you can still connect to the remote server by configuring the mcp-remote proxy with the remote URL shown above. This enables you to run tools hosted on the remote server as if they were local.

Available tools

calculator

Tool configured to proxy remote MCP calls to the calculator service via the mcp-remote proxy.