A2A Transport

Version: 2025-07-01

A2A (Google Agent-to-Agent) enables multi-agent coordination. Agents can expose themselves as A2A agents.

Mapping

A2A Concept	OAP Mapping
Agent Card	Agent descriptor
Task	An execution trace (agent processed an event)
Message	Event or Command
Artifact	Execution Trace

Transport Configuration

"a2a": {
  "agent_card_url": "http://localhost:5100/.well-known/agent.json"
}

A2A transport is optional — REST is the baseline. A2A is declared in the /.well-known/oap manifest only if the endpoint supports it.