Role in the system
A2A provides a reference model for discovering remote agents and coordinating bounded tasks without exposing their internal memory or tools.
TECHNOLOGY
Agent2Agent Protocol
Agent2Agent is an open protocol for capability discovery, task coordination and exchange between independent AI agent systems.
experimental
development
EDITORIAL FRAME
What this entry establishes.
A concise view of its scope, position, limitations and supporting sources.
Category, versions and official source
Tags and disciplines
A2AAI AgentsInteroperabilityAgent ProtocolsArtificial IntelligenceSoftware ArchitectureDistributed Systems
References behind this page
- Agent2Agent Protocol Specification A2A Protocol Project
- Google Cloud donates A2A to Linux Foundation Google for Developers / 2025-06-23
Role
A2A defines a shared language for independent agent applications. An agent can publish an Agent Card describing capabilities and interaction requirements, receive messages, manage long-running tasks and return artifacts without revealing its private prompt, memory or implementation.
Boundary
A2A and MCP solve adjacent problems. MCP connects an AI application to context and tools; A2A coordinates work between agent applications. Neither protocol supplies authorization, trustworthy identity or safe autonomy by itself.
Maturity
The protocol is open and governed through the Linux Foundation, but its interfaces are still evolving. Version 0.3.0 is a development milestone, not a guarantee of universal interoperability.
Electronic Artefacts use
A2A is relevant to VASTE as a possible edge protocol for exchanging governed tasks between runtimes. VASTE would still own entity identity, permissions, provenance and state transitions.
DOCUMENTED RELATIONSHIPS
Connected work and ideas.
Each link names the relationship between two entries and why it matters.
Knowledge Hub Fifth Wave
Agent2Agent Protocol is an explicit member of the Knowledge Hub Fifth Wave collection.
A2A, Agent Interoperability and Governed Delegation
A2A, Agent Interoperability and Governed Delegation documents Agent2Agent Protocol as one of its declared subjects.
Record details Metadata, sharing and citation
Agent2Agent Protocol
Cite this page
Agent2Agent Protocol. 1.0.0. Electronic Artefacts, 2026-07-12. https://electronicartefacts.com/knowledge/technologies/agent2agent-protocol/
Nearby relationships
2 public links connect this page to nearby projects, concepts and references.