March 15, 2025
A2A Protocol v1.0 Released
The first stable version of A2A Protocol has been released with complete specifications and reference implementations.
The open standard for Agent-to-Agent communication
Disclaimer: This website is a demonstration of the A2A Protocol concept for educational and research purposes. A2A Protocol is not an official Google product, and this website has no official affiliation with Google Inc.
Initialize secure communication channel
Query available functions and services
Submit task requirements and parameters
Handle task completion and outcomes
Establish secure communication link
Provide available service information
Confirm task execution readiness
Deliver task execution results
A2A Protocol enables standardized communication and task execution between autonomous agents
Standardized description card defining agent capabilities and functions.
Tasks exchanged between agents with clear objectives and requirements.
Communication unit between agents supporting various formats.
Building blocks of messages, including text, images, code, or structured data.
Persistent outputs of agent collaboration, such as documents or datasets.
A2A Protocol implementations in various programming languages.
The first stable version of A2A Protocol has been released with complete specifications and reference implementations.
New Python client library with simplified API and rich examples for quick integration.
Learn how to contribute to the A2A ecosystem, submit new implementations, or improve existing code.
Join the developer community and build interoperable AI agent ecosystems using standardized protocols