Abstract: The article is devoted to the urgent problem of ensuring the security of heterogeneous information platforms using a multi-agent threat detection system. The object of the study is a multi-agent platform. The authors pay special attention to such aspects of the topic as: security of multi-agent platforms, management of threat detection agents, interconnection between different threat detection agents, vulnerability in multi-agent platforms. Trends are being considered for the development of new distributed security models. The paper presents a multi-agent architecture for security services, as well as a general scenario for deploying security in multi-agent threat detection systems. The paper presents a multi-agent architecture for security services, as well as a general scenario for deploying security in multi-agent threat detection systems. Using a multi-agent system approach to a security model that provides control from the sender using the mobility and extensibility characteristics of the agent. The multi-agent protection system model for heterogeneous information platforms provides an improved approach for online communications, providing flexible mechanisms for the comprehensive protection of heterogeneous information platforms that can satisfy various security requirements and provide better control over the data to its sender.