Cloudflare Agents

Last Updated: 2025-11-21

Quick Start

export default {
  async fetch(request, env, ctx) {
    const agent = {
      tools: [
        { name: 'getTodo', handler: async ({id}) => ({id, title: 'Task'}) }
      ],
      async run(input) {
        return await processWithLLM(input, this.tools);
      }
    };
    
    return Response.json(await agent.run(await request.text()));
  }
};

Core Features

• Tool Integration: Register and execute tools
• LLM Providers: OpenAI, Anthropic, Google Gemini
• MCP Protocol: Model Context Protocol support
• Cloudflare Bindings: D1, KV, R2, Durable Objects

Agent Pattern

const agent = {
  tools: [...],
  systemPrompt: 'You are a helpful assistant',
  model: 'gpt-4o',
  async run(input) {
    // Process with LLM
  }
};

Resources

Core Documentation

• references/patterns-concepts.md

  (317 lines) - What is Cloudflare Agents, patterns & concepts, critical rules, known issues prevention

• references/configuration-guide.md

  (152 lines) - Complete configuration deep dive

• references/agent-api.md

  (115 lines) - Complete Agent Class API reference

Integration Guides

• references/http-sse-guide.md

  (74 lines) - HTTP & Server-Sent Events

• references/websockets-guide.md

  (110 lines) - WebSocket integration

• references/state-management.md

  (388 lines) - State management, scheduled tasks, workflows

• references/mcp-integration.md

  (130 lines) - Model Context Protocol integration

Advanced Features

• references/advanced-features.md

  (637 lines) - Browser automation, RAG, AI model integration, calling agents, client APIs

Error Reference

• references/error-catalog.md

  (10 lines) - Common errors and solutions

Templates

• templates/basic-agent.ts

  - Basic agent setup

• templates/browser-agent.ts

  - Browser automation

• templates/calling-agents-worker.ts

  - Calling other agents

• templates/chat-agent-streaming.ts

  - Streaming chat agent

• templates/hitl-agent.ts

  - Human-in-the-loop

• templates/mcp-server-basic.ts

  - MCP server integration

• templates/rag-agent.ts

  - RAG implementation

• templates/react-useagent-client.tsx

  - React client integration

• templates/scheduled-agent.ts

  - Scheduled tasks

• templates/state-sync-agent.ts

  - State synchronization

• templates/websocket-agent.ts

  - WebSocket agent

• templates/workflow-agent.ts

  - Workflows integration

• templates/wrangler-agents-config.jsonc

  - Wrangler configuration

Official Docs: https://developers.cloudflare.com/cloudflare-for-platforms/cloudflare-agents/