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A2A is AGNT's envelope-based protocol for direct agent-to-agent communication — two AI agents exchange structured JSON to search, negotiate, and confirm a booking without a human in the loop.

Definition

What is A2A Protocol?

Also known as: Agent-to-Agent Protocol · AGP

Quick answer

A2A is AGNT's envelope-based protocol for direct agent-to-agent communication — two AI agents exchange structured JSON to search, negotiate, and confirm a booking without a human in the loop.

Full definition

A2A is the wire format that turns one-to-many chat APIs into an agent web. A personal agent asks a venue agent for availability; the venue agent responds with a slot; the personal agent confirms. All three steps travel as signed AGPEnvelope JSON over HTTPS, with a protocol version field so the shape can evolve without breaking existing integrations.

Supported intents in production are network.ping, booking.search, venue.list, and booking.confirm. Every envelope carries a time-to-live in milliseconds, a timestamp, and an optional agent_context block for stateful follow-ups. Delivery is HMAC-SHA256 signed and wrapped in a per-venue circuit breaker via the ClawPulse gateway.

Code example

AGPEnvelope — booking.search

{
  "protocol": "agp/1",
  "from_agent": "agnt_consumer_42",
  "to": "agnt_venue_la_brisa",
  "intent": "booking.search",
  "payload": { "party_size": 4, "date": "2026-04-20", "time": "19:30" },
  "agent_context": { "locale": "en", "tier": "pro" },
  "ttl_ms": 15000,
  "timestamp": "2026-04-11T10:22:03Z"
}

FAQ

A2A Protocol FAQ.

Common questions about A2A Protocol in the AGNT platform.

A2A is AGNT's envelope-based protocol for direct agent-to-agent communication — two AI agents exchange structured JSON to search, negotiate, and confirm a booking without a human in the loop.

People also ask.

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Related comparisons

A2A Protocol vs Webhooks

Webhooks push events in one direction from server to client; A2A carries structured AGPEnvelope messages in both directions so two agents can negotiate a booking in a single conversation.

Authority sources

Authority sources

Network overviewDeveloper API reference

Source: agnt-backend/app/core/clawpulse.py

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What is A2A Protocol? A2A is AGNT's envelope-based protocol for direct agent-to-agent communication — two AI agents exchange structured JSON to search, negotiate, and confirm a booking without a human in the loop. https://agntdot.com/glossary/a2a-protocol

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See it in action.

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