This article provides a comprehensive guide on integrating Application Performance Monitoring (APM) into NestJS projects. APM is essential for monitoring and improving the performance of Node.js applications, especially those built with NestJS due to their modular and scalable nature. By seamlessly integrating APM, developers gain real-time visibility into their application's performance metrics, enabling them to identify and resolve issues efficiently. The article covers the installation of the Elastic APM Node.js Agent, configuration steps, and implementation of error capture mechanisms. With this guide, developers can enhance the performance and reliability of their NestJS applications, delivering a smoother user experience.