The Agent Communication Protocol (ACP) is a formal framework designed to enable seamless interaction among autonomous AI agents. ACP specifies a set of message types, headers, and payload conventions, along with agent discovery and registry mechanisms. It supports conversation tracking, version negotiation, and standardized error reporting. By providing language-agnostic JSON schemas and transport-agnostic bindings, ACP reduces integration complexity and allows developers to compose scalable, interoperable multi-agent systems for use in customer service bots, robotic swarms, IoT orchestration, and collaborative AI workflows.