New Relic Interactive Application Security Testing (IAST) is a tool designed to address the limitation of traditional static and dynamic application security testing methods. It provides a comprehensive view of an application's security by simulating real-world attacks, identifying exploitable vulnerabilities, and offering actionable and repeatable testing procedures. This approach enables developers to identify and fix security issues early in the development lifecycle, reducing the risk of exploits. The tool integrates with New Relic APM agents and provides features such as vulnerability prioritization, proof of exploitability, and replay tests to validate fixes. By leveraging IAST, organizations can enhance their observability, improve their security posture, and accelerate continuous integration and continuous deployment (CI/CD) pipelines.