n6 (Network Security Incident eXchange) is a system developed by CERT Polska for collecting, managing, and distributing security information at scale. The platform provides authorized users with access to threat and incident data relevant to their networks through two primary interfaces: a REST API and a web interface. The system focuses on facilitating the exchange of network security incident information, enabling organizations to access relevant threat intelligence and incident data for their infrastructure. n6 serves as a centralized platform for security information distribution, allowing users to retrieve data about security events and threats that may affect their networks. The tool is designed to support large-scale security information management and sharing among authorized parties.