🧰 Agent-to-Agent Protocol

The items that name it 8

• PCM: A Proof-Carrying Message Protocol for Verifiable Multi-Agent Communication
  paper2026-10-29It is written here as A2A.

  Agent-to-agent protocol that authenticates the channel; the paper uses plain A2A as a baseline that accepts all 712 lies.

• huiwenhan (@huiwenhan) on X
  article2026-10-25It is written here as A2A.

  Optional PRAXO-CORE adapter, listed with multi-agent supervision.

• eliasbiondo/antirion
  repo2026-10-17It is written here as A2A.

  Antirion proxies agent-to-agent traffic with agent cards behind the same keys, limits and request log.

• ERC-8444: Agentic Resource Discovery (ARD) Onchain
  thread2026-10-13It is written here as A2A.

  Agent-to-agent protocol; A2A agents are discoverable via ARD

• Draft ERC: Agentic Resource Discovery (ARD) Onchain — an address-rooted value registry whose records are ARD entries
  thread2026-10-13It is written here as A2A.

  Agent-to-agent protocol agents, one of the resource types ARD makes discoverable

• Dr Milan Milanović (@milan_milanovic) on X
  thread2026-10-07It is written here as A2A (Agent2Agent).

  Connects an agent to other agents. Each agent describes itself using an Agent Card, a JSON file at /.well-known/agent-card.json containing the agent's skills and how to authenticate. The caller usually sends a task and gets a result. Runs over JSON-RPC, gRPC or HTTP+JSON.

• Identity Management for Agentic AI [pdf] (2025)
  paper2026-10-01It is written here as Agent-to-Agent Protocol (A2A).

  A communication protocol enabling agent-to-agent interaction, cited as having wide commercial investment alongside MCP.

• santosomar/AI-agents-for-cybersecurity
  repoIt is written here as A2A.

  Agent-to-agent task messages style used in the Part 8 architecture

In every workspace you can read 9