Building a Remote MCP Server on Cloudflare (Without Auth)

@mlaurel

About Building a Remote MCP Server on Cloudflare (Without Auth)

No overview available yet

#remote-mcp-server #cloudflare #mcp-server

Config

Add this server to your MCP-compatible client using the configuration below.

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

Tools

No tools detected

Fetch the live tool list by running this server in a temporary sandbox using the button above.

Overview

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

A deployable MCP (Model Context Protocol) server that runs on Cloudflare Workers and requires no authentication. It enables remote access to MCP tools over SSE, intended for developers who want a simple, serverless MCP endpoint.

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

Deploy instantly via the “Deploy to Workers” button or locally with npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless. After deployment, connect to it from the Cloudflare AI Playground (enter the /sse URL) or from Claude Desktop using the mcp-remote proxy and the same SSE endpoint.

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

Deploy with zero authentication required
Runs serverlessly on Cloudflare Workers
Custom tools defined in src/index.ts using this.server.tool(...)
Supports SSE transport for remote MCP clients
One‑click deployment via Cloudflare button

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

Expose MCP tools to the Cloudflare AI Playground without local setup
Connect Claude Desktop to a remote MCP server using the mcp‑remote proxy
Host a lightweight, auth‑free MCP endpoint for testing or internal tooling

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

What does “Without Auth” mean?

The deployed MCP server does not enforce any authentication. Anyone with the SSE URL can access the tools.

How do I deploy this MCP server?

Click the “Deploy to Workers” button in the README, or run npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless in your terminal.

How do I add custom tools?

Edit src/index.ts and define each tool inside the init() method using this.server.tool(...).

Can I connect from Claude Desktop?

Yes. Use the mcp-remote npm package as a proxy, then add the SSE URL to Claude Desktop’s MCP server configuration (Settings > Developer > Edit Config).

What transport does the server use?

The server communicates over SSE (Server‑Sent Events), as indicated by the /sse path in the deployment URL.

Frequently asked questions

What does “Without Auth” mean?

The deployed MCP server does not enforce any authentication. Anyone with the SSE URL can access the tools.

How do I deploy this MCP server?

Click the “Deploy to Workers” button in the README, or run `npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless` in your terminal.

How do I add custom tools?

Edit `src/index.ts` and define each tool inside the `init()` method using `this.server.tool(...)`.

Can I connect from Claude Desktop?

Yes. Use the `mcp-remote` npm package as a proxy, then add the SSE URL to Claude Desktop’s MCP server configuration (Settings > Developer > Edit Config).

What transport does the server use?

The server communicates over SSE (Server‑Sent Events), as indicated by the `/sse` path in the deployment URL.

Comments

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