Authless Cloudflare

You can run a remote MCP server that exposes its tools to MCP clients, enabling you to install, customize, and connect to your own set of tools from anywhere. This guide walks you through using the remote MCP server on Cloudflare Workers and connecting clients locally or via the Cloudflare AI Playground.

How to use

Access your remote MCP server from an MCP client to run your tools and manage interactions. You have two primary connection options: a remote HTTP MCP endpoint and a local-CLI style stdio setup that routes through an MCP proxy. Use the HTTP URL when your client supports direct remote endpoints. Use the stdio approach when you want to run the MCP client locally while pointing to a remote server.

How to install

Prerequisites you need before getting started: Node.js (LTS version) and npm. If you plan to deploy to Cloudflare Workers, ensure you have a Cloudflare account set up and the ability to deploy Workers. You will also need a terminal with network access.

Step by step, you can set up a remote MCP server and connect clients as follows:

1. Deploy the remote MCP server to Cloudflare Workers using the project’s provided deployment flow.

2. Verify the deployment URL you receive resembles a remote-mcp-server-authless.your-account.workers.dev/sse endpoint.

3. Prepare a local client configuration to connect to the remote server via the MCP proxy if you prefer stdio-based execution locally.

Additional notes

Connect to the Cloudflare AI Playground to test and run your MCP tools directly in a hosted playground environment. In the playground, provide the deployed MCP server URL and start interacting with your tools.

If you want to run a local client against the remote server, you can configure a local tool runner to forward requests to the remote endpoint, or you can connect via a CLI-based approach described in the next section.

For Claude Desktop users, you can update the client configuration to point to the remote server. The example below shows how to reference the remote endpoint from your MCP configuration so that Claude Desktop loads the available tools from your remote server.

Connection options (example configurations)

{
  "mcpServers": {
    "authless": {
      "type": "http",
      "url": "https://remote-mcp-server-authless.your-account.workers.dev/sse",
      "args": []
    }
  }
}

Connecting Claude Desktop to the MCP server

You can connect Claude Desktop to the remote MCP server by updating the MCP configuration to point to the remote endpoint. Use the following example as a guide for configuring the CLI-like proxy connection.

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