APIs have evolved into an essential part of modern applications, making them an attractive target for cybercriminals. Written by a multi-award-winning cybersecurity leader , this comprehensive guide offers practical insights into testing APIs, identifying vulnerabilities, and fixing them. With a focus on hands-on learning, this book guides you through securing your APIs in a step-by-step manner. You'll learn how to bypass authentication controls, circumvent authorization controls, and identify vulnerabilities in APIs using open-source and commercial tools. Moreover, you'll gain the skills you need to write comprehensive vulnerability reports and recommend and implement effective mitigation strategies to address the identified vulnerabilities. This book isn't just about hacking APIs; it's also about understanding how to defend them. You'll explore various API security management strategies and understand how to use them to safeguard APIs against emerging threats. By the end of this book, you'll have a profound understanding of API security and how to defend against the latest threats. Whether you're a developer, security professional, or ethical hacker, this book will ensure that your APIs are secure and your organization's data is protected.