Agentic Economy Glossary
What is A2A (Agent-to-Agent Protocol)?
Google's protocol for agent discovery and communication via JSON-RPC.
Last updated · Curated by Rene Dechamps Otamendi
In depth
Google's A2A (Agent-to-Agent) protocol standardizes how agents discover each other and exchange messages. It uses JSON-RPC over HTTPS and relies on agent cards at /.well-known/agent.json for capability negotiation. A2A is transport-agnostic, meaning it works whether settlement happens on blockchain, TCK, or traditional rails. This is a key enabler of interoperability in Category C.
Why it matters
- Google standard
- JSON-RPC
- Discovery protocol
- Capability negotiation
- Transport-agnostic
Related terms
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