Remote MCP Server On Cloudflare Gqc

🚀 Set Up a Remote MCP Server on Cloudflare

Let's get a remote MCP server up and running on Cloudflare Workers with 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 a browser window at http://localhost:8787/.

🔗 Connect the MCP Inspector to Your Server

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

• Start it with npx @modelcontextprotocol/inspector.
• In the inspector (http://localhost:5173), 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 screen. 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!

🔗 Connect Claude Desktop to Your Local MCP Server

The MCP 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 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. As prompted, Claude should call the tools when appropriate.

🚀 Deploy 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

🔗 Connect a Remote MCP Client to Your Newly Deployed Remote MCP Server

Just as you did 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) as the MCP server address and click "Connect".

You are now connected to your MCP server through a remote MCP client.

🔗 Connect Claude Desktop to Your Remote MCP Server

Update your Claude configuration file to point to your workers.dev URL (e.g., https://worker-name.account-name.workers.dev/sse), and then restart Claude.

{
  "mcpServers": {
    "math": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "https://worker-name.account-name.workers.dev/sse"
      ]
    }
  }
}

🐞 Debugging

If any issues arise, restarting Claude or directly connecting to your MCP server with the following command may help:

npx mcp-remote http://localhost:8787/sse

In rare cases, clearing the files in the ~/.mcp-auth directory may be helpful:

rm -rf ~/.mcp-auth