Building a Remote MCP Server on Cloudflare (Without Auth)

What is Building a Remote MCP Server on Cloudflare (Without Auth)?

This server lets you deploy a remote MCP server with no authentication on Cloudflare Workers. It provides a Server-Sent Events (SSE) endpoint for connecting MCP clients like Cloudflare AI Playground or Claude Desktop, and allows custom tools defined in the worker code.

How to use Building a Remote MCP Server on Cloudflare (Without Auth)?

Deploy via the "Deploy to Workers" button or run npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless. Customize tools in src/index.ts inside the init() method using this.server.tool(...). Connect remote clients by providing the deployed SSE URL (e.g., remote-mcp-server-authless.<your-account>.workers.dev/sse). For Claude Desktop, use the mcp-remote proxy and configure the server in Settings > Developer > Edit Config.

Key features of Building a Remote MCP Server on Cloudflare (Without Auth)

• Deployed on Cloudflare Workers
• No authentication required
• Customizable tools via this.server.tool()
• Supports Server-Sent Events (SSE) transport
• Works with Cloudflare AI Playground remotely
• Connects to Claude Desktop via mcp-remote proxy

Use cases of Building a Remote MCP Server on Cloudflare (Without Auth)

• Provide MCP tools to Cloudflare AI Playground without a local server
• Connect Claude Desktop to a cloud-hosted MCP server
• Quickly prototype and share MCP tools with a public URL
• Enable MCP functionality without managing authentication

FAQ from Building a Remote MCP Server on Cloudflare (Without Auth)

How do I deploy this MCP server?

Click the "Deploy to Workers" button from the README, or use npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless to create the project locally and then deploy via Wrangler.

How do I add custom tools?

Open src/index.ts and inside the init() method call this.server.tool(...) for each tool you want to add. Refer to Cloudflare’s MCP tools documentation for the full API.

Can I connect to Cloudflare AI Playground?

Yes. After deployment, go to https://playground.ai.cloudflare.com/, enter your server’s SSE URL (e.g., remote-mcp-server-authless.your-account.workers.dev/sse), and use the tools directly.

How do I connect Claude Desktop to this server?

Install the mcp-remote proxy package, then add the following to your Claude Desktop configuration (claude_desktop_config.json):

{
  "mcpServers": {
    "calculator": {
      "command": "npx",
      "args": ["mcp-remote", "http://localhost:8787/sse"]
    }
  }
}

Replace the URL with your deployed server’s address. Restart Claude Desktop.

Does this server require authentication?

No. The server is explicitly built without authentication. Anyone with the SSE URL can connect to it and use its tools.