Remote MCP Server On Cloudflare Um9

🚀 Running a Remote MCP Server on Cloudflare

Let's get a remote MCP server up and running on Cloudflare Workers with OAuth login!

🚀 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 a browser window 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 be taken to a (simulated) user/password login page. Enter any email and password to log in.
• You should be redirected back to the MCP Inspector, and you can now 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, and in Claude Desktop, go to Settings > Developer > Edit Configuration to find the configuration file.

Open the file in 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 over HTTP.

When you open Claude, a browser window should open and allow you to log in. You should see available tools in the bottom right corner. Given the right prompt, Claude should ask to call a tool.

🚀 Deployment to Cloudflare

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

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

Just like in "Local Development" 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) and click "Connect" as the MCP server URL.

You've 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., https://worker-name.account-name.workers).