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- 📋 Overview
- 🚀 Getting Started
- 📚 Resources
- 📦 Official Samples
- 🛠️ Tools
- 🤝 Community Implementations
- 🎯 Community Samples
- 👥 Community
- 🤝 Contributing
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
-
Learn the Basics
- 📖 Read the technical documentation
- 🎥 Watch the demo video
-
Run Samples
- 📥 Clone the official repo
- 📝 Follow instructions in
/samples
-
Build Your Own
- 🛠️ Use official libraries or adapt samples
- 🏗️ Start with a basic A2A agent or client
| 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 |
| Project Name | Description | Link |
|---|---|---|
| CLI | Command line client | cli |
| Multiagent | Multi-agent orchestrator | multiagent |
| Project Name | Description | Link |
|---|---|---|
| Server | Go language A2A server implementation | server |
| Client | Go language A2A client implementation | client |
| Models | Shared data structures | models |
| Project Name | Description | Link |
|---|---|---|
| Movie Agent | Movie information search agent using TMDB API | movie-agent |
| Coder Agent | Code generation agent | coder |
Essential tools for A2A protocol development, testing, and validation.
| Name | Author | Description | Stars |
|---|---|---|---|
| a2a-python | 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 |  |
| 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 |  |
Contributions are welcome! Please read the contributing guidelines first.