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AI Agent Protocols Explained: Your Guide to MCP, A2A, and ACP

To move beyond isolated AI, a new set of communication standards is emerging to create a collaborative “Internet of Agents.” This guide explains the key protocols—MCP for tool access, A2A for internet-scale teamwork, and ACP for internal agent clusters—and how they form the foundational stack for the next generation of intelligent systems. By understanding how these protocols work together, technical leaders can design robust, interconnected AI architectures for the future.