Main

A2A evaluation checklist:

• Does the project document authentication and authorization clearly?
• Can it run in your deployment model (local dev, container, or managed service)?
• Does it interoperate with your existing tool protocol (MCP) or do you need bridges?

README excerpt (verbatim)

Awesome A2A

A curated list of awesome Agent2Agent (A2A) protocol servers. This repository collects and organizes A2A-compliant server implementations to help developers build interoperable AI agent systems.

• What is A2A?
• Clients
• Tutorials
• Community
• Legend
• Server Implementations
• Frameworks
• Utilities
• Contributing
• License

What is A2A?

A2A (Agent2Agent) is an open protocol created by Google that enables different AI agents to communicate and collaborate with each other using a standardized interface. The protocol allows agents to discover capabilities, submit tasks for execution, monitor task progress, and receive task results in a unified way.

Clients

AI clients that can interact with A2A servers:

• Claude from Anthropic
• Gemini from Google
• Custom A2A-compatible clients

Tutorials

• Getting Started with A2A Protocol
• Building Your First A2A Server

Community

• Google A2A GitHub

Legend

• 🎖️ – official implementation
• programming language
  • 🐍 – Python codebase
  • 📇 – TypeScript/JavaScript codebase
  • 🏎️ – Go codebase
  • 🦀 – Rust codebase
  • #️⃣ - C# Codebase
  • ☕ - Java codebase
• scope
  • ☁️ - Cloud Service
  • 🏠 - Local Service
  • 📟 - Embedded Systems
• operating system
  • 🍎 – For macOS
  • 🪟 – For Windows
  • 🐧 - For Linux

[!NOTE] Confused about Local 🏠 vs Cloud ☁️?

• Use local when A2A server is talking to a locally installed software.
• Use cloud when A2A server is talking to remote APIs, like Google Maps API.

Server Implementations

• 🎖️ - Official Samples
• 🗺️ - Location Services
• 💼 - Business Tools
• 🖼️ - Image Generation
• 💱 - Financial Services
• 🔎 - Search & Data Extraction
• 💬 - Communication Services
• 🔄 - Integration Services
• 🛠️ - Developer Tools
• 🧠 - Knowledge Services
• 📊 - Data Services
• 🚆 - Travel & Transportation

FAQ

Q: What is A2A here? A: It refers to Agent2Agent protocol implementations and ecosystem components listed in the repo.

Q: Is it compatible with MCP? A: They are different surfaces; you may need a bridge if you want one stack to expose both.

Q: How do I start? A: Pick one server and one SDK in your preferred language and build a minimal ping/route demo.