Authless

You can host a remote MCP Server that runs on Cloudflare Workers and exposes its tools over HTTP. This setup lets you access and use your MCP tools from remote clients without needing local authentication, enabling quick experimentation and collaboration.

How to use

Connect from an MCP client to your remote server to start using tools. You will typically use either a remote HTTP URL or a local proxy setup to reach the server’s SSE endpoint.

How to install

Prerequisites you need before proceeding:

• Node.js and npm installed on your development machine.

Steps to set up the remote MCP Server on Cloudflare Workers:

# Option 1: Deploy via Cloudflare Deploy UI (quick start)
# Open the deployment URL and follow the prompts to create your remote MCP Server
# The deployment URL will resemble: remote-mcp-server-authless.your-account.workers.dev/sse

Additional sections

Configure and customize your MCP server by adding tools through the server’s initialization logic. You define each tool inside the init() method using a tool registration call, which makes the tool available to clients immediately after the server starts.

Connect to the Cloudflare AI Playground to test and experiment with your MCP server. Use the Playground to interact with your deployed server at the URL shown during deployment.

You can also connect to your remote MCP server from local MCP clients via a proxy. The example configuration shows a standard approach to wiring a client to the server’s SSE endpoint. Use the calculator configuration as a reference for how to point a local client to the remote server’s SSE URL.

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