Remote MCP Server On Cloudflare Qc4

🚀 Setting Up a Remote MCP Server on Cloudflare

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

🚀 Quick Start

📦 Installation

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

# Navigate to this example directory
cd ai/demos/remote-mcp-server

# Install dependencies
npm install

# Run locally
npm run dev

You should be able to open http://localhost:8787/ in your browser.

💻 Usage Examples

Connecting the MCP Inspector to Your Server

To explore the 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 as the MCP server address in the URL, and click "Connect".
• You'll be redirected 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 your configuration file.

Open the file in a text editor and replace it with the following:

{
  "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. Depending on the right prompts, Claude may ask to call a tool.

🚀 Deployment to Cloudflare

1. npx wrangler@latest kv namespace create remote-mcp-server-oauth-kv
2. Follow the instructions 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 the "Local Development" section above, run the 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 address and click "Connect".

You are now 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.dev/sse), and then restart Claude.

{
  "mcpServers": {
    "math": {
      "command": "npx",
      "args": [
        "mcp-remote",
        // Keep the rest of the code as it is
      ]
    }
  }
}