✨ A2A Directory ✨

!Awesome A2A

!PR Welcome

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Contents

• 📋 Overview
• 🚀 Getting Started
• 📚 Resources
• 📦 Official Samples
• 🛠️ Tools
• 🤝 Community Implementations
• 🎯 Community Samples
• 👥 Community
• 🤝 Contributing

Overview

A2A (Agent2Agent) is an open protocol from Google enabling AI agents to communicate securely and collaborate. It breaks down silos between isolated agent systems, allowing for complex cross-application automation.

Key Features:

• 🎯 Simple: Uses HTTP, JSON-RPC, SSE
• 🏢 Enterprise Ready: Focuses on security and privacy
• ⚡ Async First: Handles long-running tasks
• 🔄 Modality Agnostic: Supports text, files, forms, streams
• 🔒 Opaque Execution: Agents interact without sharing internal logic

Official Links:

• 🌐 Website: google.github.io/A2A
• 📦 GitHub: https://github.com/google-a2a/A2A

Getting Started

1. Learn the Basics

   • 📖 Read the technical documentation
   • 🎥 Watch the demo video

2. Run Samples

   • 📥 Clone the official repo
   • 📝 Follow instructions in /samples

3. Build Your Own

   • 🛠️ Use official libraries or adapt samples
   • 🏗️ Start with a basic A2A agent or client

Resources

Official Documentation

• 🇺🇸 Technical Documentation
• 🇺🇸 JSON Specification
• 🇺🇸 Agent Card Specification

Official Samples

Python Sample Collection

Agent Examples (Intelligent Agents Based on Different Frameworks)

| Project Name | Description | Link | |-------------|-------------|------| | Google ADK | Expense report filling agent, showcasing multi-turn interactions and web form handling | google_adk | | AG2 + MCP | MCP-enabled agent based on AG2 framework | ag2 | | Azure AI Foundry | Agent based on Azure AI Foundry services | azureaifoundry_sdk | | LangGraph | Currency conversion agent with tool usage and streaming updates | langgraph | | CrewAI | Image generation agent with multi-turn interactions and image transmission | crewai | | LlamaIndex | File parsing and chat agent with file upload and streaming updates | llama_index_file_chat | | Marvin | Contact information extraction agent | marvin | | MindsDB | Enterprise data agent supporting database queries | mindsdb | | Semantic Kernel | Travel agent based on Microsoft Semantic Kernel framework | semantickernel | | AutoGen | AutoGen framework example | autogen | | Hello World | Basic example agent | helloworld | | Veo Video Generation | Video generation agent | veo_video_gen | | Analytics | Analytics agent | analytics | | A2A Telemetry | Telemetry data agent | a2a_telemetry | | A2A MCP | MCP protocol agent | a2a_mcp | | Birthday Planner ADK | Birthday planning agent | birthday_planner_adk | | Headless Agent Auth | Headless agent authentication example | headless_agent_auth |

Host Applications (Client Applications)

| Project Name | Description | Link | |-------------|-------------|------| | CLI | Command line client | cli | | Multiagent | Multi-agent orchestrator | multiagent |

Go Language Examples

| Project Name | Description | Link | |-------------|-------------|------| | Server | Go language A2A server implementation | server | | Client | Go language A2A client implementation | client | | Models | Shared data structures | models |

JavaScript/TypeScript Examples

| Project Name | Description | Link | |-------------|-------------|------| | Movie Agent | Movie information search agent using TMDB API | movie-agent | | Coder Agent | Code generation agent | coder |

Tools

Essential tools for A2A protocol development, testing, and validation.

🔗 A2A Protocol Validator

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Community Implementations

| Name | Author | Description | Stars | |------|--------|-------------|-------| | a2a-python | @google | Official Python SDK for the Agent2Agent (A2A) Protocol | | | a2a-js | @google-a2a | Official JavaScript SDK for the Agent2Agent (A2A) Protocol - A JavaScript library that helps run agentic applications as A2AServers | | | a2a-java | @a2aproject | Official Java SDK for the Agent2Agent (A2A) Protocol - A Java library that helps run agentic applications as A2AServers | | | a2a-go | @a2aproject | Official Go SDK for the Agent2Agent (A2A) Protocol | | | a2ajava | @vishalmysore | A pure Java implementation of Google's A2A protocol for Spring Boot applications, featuring both client and server implementations | | | a2a4j | @a2ap | A2A4J is a comprehensive Java implementation of the Agent2Agent Protocol, including server, client, examples, and a starter — ready to use out of the box. | | | legion-a2a | @TheRaLabs | A TypeScript implementation of the A2A protocol with a focus on modularity and extensibility | | | trpc-a2a-go | @trpc-group | Go A2A implementation by the tRPC team featuring full client/server support, in-memory task management, streaming responses, session management, multiple auth methods (JWT, API Key, OAuth2), and comprehensive examples | | | jira-a2a | @tuannvm | The Jira A2A system is a DevOps workflow automation platform using the tRPC-A2A-Go framework. It consists of independent Go agents that communicate via A2A messages. | | | a2a-go | @a2aserver | A Go library for building A2A servers, with example implementations | | | a2a-rs | @EmilLindfors | An idiomatic Rust implementation following hexagonal architecture principles | | | a2a_min | @pcingola | A minimalistic Python SDK for A2A communication | | | a2adotnet | @azixaka | A C#/.NET implementation of the A2A protocol | | | nestjs-a2a | @thestupd | A module for integrating the A2A protocol into NestJS applications | | | python-a2a | @themanojdesai | An easy-to-use Python library for implementing the A2A protocol | | | Aira | @IhateCreatingUserNames2 | An A2A network implementation for hosting, registering, discovering, and interacting with agents | | | Cognisphere | @IhateCreatingUserNames2 | An AI agent development framework built on Google's ADK, facilitating agent creation potentially for A2A networks | | | a2a-server | @chrishayuk | A lightweight A2A python implementation | | | a2a-cli | @chrishayuk | A command-line client for the A2A | | | A2A Test Suit | @robert-at-pretension-io | A2A Test Suite | | | Grasp | @adcentury | A Self-hosted Browser Using Agent with built-in MCP and A2A support | | | swissknife | @daltonnyx | A multi-agent chat application with MCP support, aiming to expose agents via the A2A protocol and connect to remote A2A agents as a client | | | artinet-sdk | @the-artinet-project | A JS/TS SDK for the Agent2Agent Protocol with a focus on developer experience and comprehensive features | | | a2a-validation-tool | @llmx-de | A desktop application for testing and validating Agent-to-Agent (A2A) protocol implementations | |

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Community Samples

| Name | Author | Description | Stars | |------|--------|-------------|-------| | a2a-agent-coder | @sing1ee | A Coder Agent implementation with A2A Server and Client | | | agentic-trading | @kweinmeister | A sample application demonstrating Google ADK and A2A interoperability for trading automation | | | python-a2a-tutorial | @sing1ee | A comprehensive tutorial for implementing A2A in Python with practical examples | | | a2a-python-currency | @sing1ee | A tutorial implementation of a Currency Agent using the A2A Python SDK | | | a2a-mcp-openrouter | @sing1ee | Demonstrates A2A + MCP integration using OpenRouter as LLM provider, showcasing unified interface for agent-to-agent communication and tool invocation | | | a2a_llama_index_file_chat | @sing1ee | A LlamaIndex-based file chat agent supporting file upload/parsing, conversational interactions, streaming responses, and in-line citations | |

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Community

• 🐛 GitHub Issues
• 💬 GitHub Discussions

Contributing

Contributions are welcome! Please read the contributing guidelines first.

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