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worker-mcp

A high-performance MCP (Model Context Protocol) server running on Cloudflare Workers/Pages edge computing platforms.

Features

  • Web Dashboard - Visual interface to browse and test MCP tools
  • MCP Protocol - Full JSON-RPC 2.0 support over HTTP/SSE
  • Built-in Tools:
    • add - Simple addition calculator
    • searxng_web_search - Web search via SearXNG
    • web_url_read - Fetch and read URL content
    • sequentialthinking - Structured problem-solving tool

Getting Started

Install Dependencies

npm install

Local Development

# Cloudflare Workers (recommended)
npm run dev

# Or Cloudflare Pages
npm run dev:pages

Open http://localhost:8787 in your browser to see the dashboard.

Connect MCP Inspector

Use MCP Inspector to test your server:

npx @modelcontextprotocol/inspector

Configure the inspector:

  • Transport Type: SSE
  • URL: http://localhost:8787/mcp

After connecting, you should see your available tools and be able to call them.

Connect to Claude Desktop

Add to your Claude Desktop config (claude_desktop_config.json):

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

Deployment

Cloudflare Workers (Recommended)

npm run deploy

Cloudflare Pages

npm run deploy:pages

Environment Variables

VariableRequiredDescription
API_KEYNoAPI key for MCP endpoint authentication

Project Structure

worker-mcp/
├── src/
│   ├── index.ts        # Workers entry point
│   ├── app.ts          # Hono web app (dashboard)
│   ├── server.ts       # MCP request handler
│   └── tools/          # MCP tool implementations
│       ├── index.ts
│       ├── add.ts
│       ├── web-search.ts
│       ├── web-url-read.ts
│       └── sequentialthinking.ts
├── pages/
│   ├── _worker.ts      # Pages Functions entry point
│   └── _routes.json    # Pages routing config
├── static/             # Static assets (dashboard UI)
├── wrangler.jsonc      # Workers configuration
├── package.json
└── biome.json          # Code formatting/linting

API Endpoint

EndpointMethodDescription
/GETWeb dashboard
/mcpPOSTMCP JSON-RPC 2.0 endpoint

MCP Endpoint

URL: https://your-worker.workers.dev/mcp

Authentication (if API_KEY is set):

# Via header
curl -H "Authorization: Bearer YOUR_API_KEY" https://your-worker.workers.dev/mcp

# Or via query parameter
curl https://your-worker.workers.dev/mcp?apiKey=YOUR_API_KEY

Troubleshooting

Clear MCP auth cache

rm -rf ~/.mcp-auth

Check logs

npx wrangler tail

License

MIT

About

https://github.com/NuerSir/mcp-server-worker.git

Language
TypeScript97.7%
CSS1.9%
Dockerfile0.4%