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Building a Remote MCP Server on Cloudflare (Without Auth)

Building a Remote MCP Server on Cloudflare (Without Auth)

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github.com/raayraay69Developer Tools0Updated 74w ago
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About Building a Remote MCP Server on Cloudflare (Without Auth)

A Cloudflare Workers example for deploying an unauthenticated remote MCP server. It is aimed at developers who want to define custom tools and connect MCP clients to a server hosted on Cloudflare.

Key features

  1. 01Deploy on Cloudflare Workers
  2. 02Run without authentication
  3. 03Add tools in `src/index.ts`
  4. 04Connect remote and local clients

Use cases

  1. 01Publish a remote MCP server on Cloudflare
  2. 02Add custom tools in the `init()` method
  3. 03Connect Cloudflare AI Playground to a server
  4. 04Reach a remote server from Claude Desktop

MCP support

The example deploys an MCP server that exposes tools to MCP clients over a remote endpoint. Clients can connect through Cloudflare AI Playground or use the `mcp-remote` proxy.

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

Configuration

Local server config is the same for every client. Copy it into your client’s MCP config file.

No install method listed yet

We haven’t collected a package or remote endpoint for this server. Follow the instructions in the project README.

Repository

Tools

No tool list yet

Local servers expose tools only once running on your machine, and the maintainer has not provided a tool list.

Details

From the project README

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.

Get started:

Deploy to Workers

This will deploy your MCP server to a URL like: remote-mcp-server-authless.<your-account>.workers.dev/sse

Alternatively, you can use the command line below to get the remote MCP Server created on your local machine:

npm create cloudflare@latest -- my-mcp-server --template=cloudflare/ai/demos/remote-mcp-authless

Customizing your MCP Server

To add your own tools to the MCP server, define each tool inside the init() method of src/index.ts using this.server.tool(...).

Connect to Cloudflare AI Playground

You can connect to your MCP server from the Cloudflare AI Playground, which is a remote MCP client:

  1. Go to https://playground.ai.cloudflare.com/
  2. Enter your deployed MCP server URL (remote-mcp-server-authless.<your-account>.workers.dev/sse)
  3. You can now use your MCP tools directly from the playground!

Connect Claude Desktop to your MCP server

You can also connect to your remote MCP server from local MCP clients, by using the mcp-remote proxy.

To connect to your MCP server from Claude Desktop, follow Anthropic's Quickstart and within Claude Desktop go to Settings > Developer > Edit Config.

Update with this configuration:

{
  "mcpServers": {
    "calculator": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "http://localhost:8787/sse"  // or remote-mcp-server-authless.your-account.workers.dev/sse
      ]
    }
  }
}

Restart Claude and you should see the tools become available.

Comments

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New to MCP?

From what the protocol is to installing your first server, these answers cover most first questions.

An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.