Cloudflare MCP Server

Last Updated: 2025-11-21

Quick Start

import { McpServer } from '@modelcontextprotocol/sdk';

const server = new McpServer({
  name: 'my-server',
  version: '1.0.0'
});

server.tool('getTodo', async ({ id }) => ({
  id,
  title: 'Task',
  completed: false
}));

export default server;

Core Concepts

• Tools: Functions AI can call
• Resources: Data AI can access
• Prompts: Reusable templates
• Transports: SSE, HTTP, WebSocket

Example Tool

server.tool('searchDocs', {
  description: 'Search documentation',
  parameters: {
    type: 'object',
    properties: {
      query: { type: 'string' }
    }
  },
  handler: async ({ query }) => {
    return { results: [...] };
  }
});

Resources

Core Documentation

• references/quick-start-guide.md

  (704 lines) - Official Cloudflare templates, complete step-by-step workflow, 5-minute setup

• references/core-concepts.md

  (66 lines) - MCP fundamentals: tools, resources, prompts, transports

• references/worker-basics.md

  (326 lines) - Worker & Durable Objects basics, transport selection, HTTP fundamentals

• references/stateful-servers.md

  (246 lines) - Durable Objects integration, WebSocket hibernation, cost optimization, common patterns

• references/production-deployment.md

  (814 lines) - Deployment & testing, configuration reference, authentication patterns, 22 known errors with solutions

Templates

• templates/basic-mcp.ts

  - Minimal MCP server

• templates/tools-example.ts

  - Tool definitions

• templates/durable-object-mcp.ts

  - Stateful MCP with DO

• templates/websocket-mcp.ts

  - WebSocket transport

Official Docs: https://modelcontextprotocol.io | Cloudflare: https://developers.cloudflare.com/workers/runtime-apis/durable-objects/