Remote MCP Server On Cloudflare Qd4

🚀 Running a Remote MCP Server on Cloudflare

Let's set up a remote MCP server running on Cloudflare Workers and integrate OAuth login functionality!

🚀 Quick Start

Local Development

# Clone the repository
git clone git@github.com:cloudflare/ai.git

# Install dependencies
cd ai
npm install

# Run locally
npx nx dev remote-mcp-server

You should be able to open the browser at http://localhost:8787/.

Connecting the MCP Inspector to Your Server

To explore your new MCP API, you can use the MCP Inspector.

• Start it using npx @modelcontextprotocol/inspector.
• In the inspector, switch the transport type to SSE, enter http://localhost:8787/sse in the URL, and click "Connect".
• You'll enter a (simulated) user/password login page. Enter any email and password to log in.
• After successful login, you should be redirected back to the MCP inspector, and you can list and call any defined tools!

Connecting Claude Desktop to Your Local MCP Server

The inspector is great, but we really want to connect it to Claude! Follow Anthropic's Quick Start Guide, go to "Settings" > "Developer" > "Edit Configuration" in Claude Desktop, and find your configuration file. Open the file with a text editor and replace it with the following configuration:

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

This will run a local proxy that allows Claude to communicate with your MCP server via HTTP. When opening Claude, a browser window should appear and prompt you to log in. You should see the available tools in the bottom right corner. Depending on the correct prompt, Claude may request to call a tool.

Deployment to Cloudflare

1. npx wrangler kv namespace create OAUTH_KV
2. Add the KV namespace ID to wrangler.jsonc according to the guide.
3. npm run deploy

Calling Your Newly Deployed Remote MCP Server from a Remote MCP Client

Just like in the "Local Development" section above, run the MCP inspector: npx @modelcontextprotocol/inspector@latest Then, in the inspector, enter your Worker's workers.dev URL (e.g., worker-name.account-name.workers.dev/sse) as the MCP server URL and click "Connect". You've successfully connected to your MCP server through a remote MCP client.

Connecting Claude Desktop to Your Remote MCP Server

Update the Claude configuration file to point to your workers.dev URL (e.g., worker-name.account-name.workers).