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Building a Remote MCP Server on Cloudflare (Without Auth)

@tomklein0

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

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#remote-mcp#cloudflare#server

Config

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Overview

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

This example deploys a remote MCP server on Cloudflare Workers without requiring authentication. It is intended for developers who want a quick, public MCP server endpoint for tools accessible via server-sent events (SSE).

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 inside the init() method of src/index.ts using this.server.tool(...). Connect to Cloudflare AI Playground by entering the deployed SSE URL, or connect to Claude Desktop using the mcp-remote proxy with the SSE URL in the claude_desktop_config.json.

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

  • Deploy a remote MCP server on Cloudflare Workers.
  • No authentication required for the server.
  • Exposes an SSE endpoint at /sse.
  • Supports custom tools defined in src/index.ts.
  • Works with Cloudflare AI Playground and Claude Desktop.

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

  • Quickly prototyping remote MCP tools for AI clients.
  • Connecting Cloudflare AI Playground to custom MCP tools.
  • Using a remote MCP server with local Claude Desktop via an SSE proxy.
  • Demo or testing environments where authentication is not needed.

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

What is the server URL after deployment?

The URL follows the pattern remote-mcp-server-authless.<your-account>.workers.dev/sse.

How do I add custom tools?

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

How can I connect this server to Claude Desktop?

Use the mcp-remote proxy: install it via npm, then configure Claude Desktop settings with the SSE URL as shown in the README.

What runtime or dependencies are required?

The server runs on Cloudflare Workers. Local development requires Node.js and the Cloudflare CLI (npm create cloudflare).

Does this server include authentication?

No, the server is intentionally built without authentication.

Frequently asked questions

What is the server URL after deployment?

The URL follows the pattern `remote-mcp-server-authless.<your-account>.workers.dev/sse`.

How do I add custom tools?

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

How can I connect this server to Claude Desktop?

Use the `mcp-remote` proxy: install it via npm, then configure Claude Desktop settings with the SSE URL as shown in the README.

What runtime or dependencies are required?

The server runs on Cloudflare Workers. Local development requires Node.js and the Cloudflare CLI (`npm create cloudflare`).

Does this server include authentication?

No, the server is intentionally built without authentication.

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Developer Tools

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tomklein0

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