AI Agent Communications in the Future Internet -- Paving A Path toward Agentic Web

The rapid evolution of artificial intelligence technologies toward the agentic AI paradigm enables the emergence of Agentic Web in the future Internet. Agent communication plays a critical role in constructing the Agentic Web but faces unique challenges posed by the edge-network-cloud continuum in the future Internet. This paper provides a comprehensive overview of state‑of‑the‑art agent communication protocols and technologies, evaluating their readiness to support the construction of the Agentic Web. We first survey representative communication protocols and analyze the key technologies they employ, assessing their effectiveness in addressing the challenges for agent communications in the future Internet. We then identify critical gaps between existing approaches and the requirements of the Agentic Web, propose a unified architectural framework grounded in virtualization and service‑oriented principles, and outline key research directions needed to advance toward a fully realized Agentic Web.