APIsec University is the world’s largest free API security education platform, trusted by more than 120,000 students across engineering, DevOps, AppSec, and penetration testing. Our mission is simple: build the next generation of API attackers and defenders through hands-on, real-world, practitioner-led training. APIsec University was created by industry experts, authors, and active penetration testers, and every course is designed around doing, not just learning. Students get practical labs, vulnerable APIs, real exploits, and defensive patterns they can use immediately in their work. Why Students Love APIsec University • 100% free, forever • Hands-on labs, not just lectures • Taught by leading API security experts, including authors of Hacking APIs and contributors to the OWASP API Security Top 10 • Community support via Discord (24/7 peer help, expert Q&A) • Real attack and defense patterns, not abstract slides APIsec University is built for developers, AppSec teams, penetration testers, cloud engineers, architects, and anyone responsible for building or defending APIs.