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A2A Protocol Specification & Manifests

🤝 Agent-to-Agent (A2A) Protocol & Inter-Agent Standards⏱ 20 min⭐ 200 BASE XP⌨ HANDS-ON LAB

The Agent-to-Agent (A2A) Communication Standard

The Agent-to-Agent (A2A) Protocol provides a standardized JSON-RPC 2.0 interface for autonomous agents to discover each other, negotiate capabilities, and delegate subtasks across organizational boundaries.

A2A Handshake Lifecycle

  1. Discovery: The initiating agent queries the directory registry for agents advertising required capabilities.
  2. Capability Negotiation: The agents verify mutual protocol versions (e.g. A2A-1.0) and authentication scopes.
  3. Delegation & Execution: The supervisor dispatches an atomic task payload with clear completion criteria.
  4. Telemetry & Settlement: The worker emits progress heartbeats and final structured output.
⌨ HANDS-ON LABValidate Agent-to-Agent (A2A) Contract Schema
⭐ +200 XP

Define and validate a JSON-RPC 2.0 A2A delegation contract allowing a supervisor agent to dispatch work to a specialist agent.

1Validate the A2A capability manifest defining input parameters and output schemas.
lab-sandbox — simulated environment
INFINITY LAB SANDBOX v2.6 — simulated shell
Type the command for the current objective. Helpers: "hint", "solution", "clear".
$
OBJECTIVE 1 / 1 — type "hint" if stuck
SYNAPSE VERIFICATION
QUERY 1 // 1
What protocol standard forms the structural foundation of the Agent-to-Agent (A2A) specification?
SOAP 1.1
JSON-RPC 2.0
FTP
Telnet