Akamai reports that 83% of traffic on their Akamai network is API hits, which is more than HTML traffic. Our discussion focuses on the API First strategy, which places API design and planning at the forefront of project development, enhancing collaboration, scalability and integration. Hosts Alan Shimel and Mitch Ashley are joined by experts Chris Colosimo (Tricentis), Tracy Ragan (DeployHub) and Chris Lindsey (Mend) to explore how this approach streamlines the development process and enriches end-user experiences. Testing APIs is challenging primarily due to their complex interactions with various software components and external systems, leading to unpredictable behaviors and edge cases. They also discuss how to ensure comprehensive coverage, including security, performance and error handling in a constantly evolving environment, which requires meticulous planning and robust testing frameworks. Lastly, the conversation shifts to the critical importance of API Security (APISec), examining the security measures necessary to protect APIs from emerging threats. Through authentication, authorization, encryption and threat detection techniques, our panelists will illuminate how to safeguard valuable data and systems in our interconnected digital ecosystem.