Agent Transfer Protocol: Server-Mediated Agent-to-Agent Communication Architecture for the Agentic Web

The paper introduces the Agent Transfer Protocol (ATP), a cross‑organization communication protocol designed to enable continuous collaboration among agents from different administrative domains. ATP uses domain‑mediated servers to maintain stable addresses, store messages for offline instances, and verify message integrity, allowing agents to operate independently of continuous connectivity. A prototype implementation demonstrated that business workflows could continue after instances went offline, with successful verification of message source and content and quantified latency overhead.

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