✨ A2A Directory ✨

Awesome A2A

PR Welcome

📋 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

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

Resources

Official Documentation

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

⬆️ Back to Contents

Community Implementations

Name	Author	Description
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

⬆️ Back to Contents

Community Samples

Name	Author	Description
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