The Sequence Engineering #523: Diving Into Google's Agent2Agent (A2A) Protocol
A new, hot protocol for multi-agent interactions
The rise of autonomous agents marks a turning point in artificial intelligence. As these agents increasingly take on responsibilities across workflows, applications, and domains, the need for interoperable communication becomes vital. Historically, most agents have been siloed—designed within proprietary frameworks and unable to collaborate with others outside their ecosystems. Recognizing this limitation, Google introduced the Agent2Agent (A2A) protocol, a flexible and standardized framework to enable direct interaction between AI agents, regardless of their implementation specifics. A2A is engineered not merely as a communication tool but as a foundational layer for orchestrating distributed intelligence across diverse systems.