Building a Remote MCP Server on Cloudflare (Without Auth)

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

This example allows you to deploy a remote MCP server that doesn't require authentication on Cloudflare Workers. It is for developers who want to expose MCP tools over SSE without a login barrier.

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 locally. Add custom tools inside src/index.ts using this.server.tool(...) in the init() method. Connect clients like Cloudflare AI Playground or Claude Desktop (via mcp-remote proxy) using the SSE endpoint URL.

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

• Deploy a remote MCP server with zero authentication.
• Add custom tools by defining them in init().
• Connect from Cloudflare AI Playground as a remote client.
• Use with Claude Desktop via the mcp-remote proxy.
• Fully serverless on Cloudflare Workers.

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

• Expose MCP tools to any remote client without user login.
• Prototype or demo MCP tools publicly.
• Integrate MCP capabilities into Cloudflare AI Playground workflows.
• Connect desktop MCP clients (e.g., Claude) to cloud-hosted tools.

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

What does "without auth" mean?

The deployed MCP server does not require any authentication (API key, token, etc.) to access its SSE endpoint.

What are the deployment options?

You can deploy via the "Deploy to Workers" button on the README, or use npm create cloudflare@latest with the provided template.

How do I add custom tools?

Define each tool inside the init() method of src/index.ts using this.server.tool(...).

How do I connect from Claude Desktop?

Use the mcp-remote proxy: set the command to npx with args including mcp-remote and your server's SSE URL. Configure in Claude Desktop's settings.

Where does the MCP server run?

It runs on Cloudflare Workers at a URL like remote-mcp-server-authless.<your-account>.workers.dev/sse.