MInd the Gap. Microservices + API Traffic Security. APIDefender is an API security gateway designed to block unauthorized access to APIs and prevent system attacks through proactive threat management in real-time. If you have a developer community, APIDefender is the perfect enterprise-grade security gateway for your developer platform. On-premise. In-the-cloud. API Security, Mobile Application Security, APIs, Threat Intelligence, Admission Control, Application Security, OWASP Top-10