API performance monitoring is essential for the success of applications and services that rely on APIs, ensuring they function correctly and efficiently by tracking metrics such as response time, latency, throughput, error rates, and availability. Effective monitoring helps identify performance bottlenecks, optimize resources, and maintain a seamless user experience, which is critical in today's digital landscape. Various tools, both open-source like Prometheus and Grafana and commercial options such as Datadog and New Relic, provide real-time insights and alerting capabilities to ensure APIs meet performance standards. Additionally, understanding API usage metrics helps organizations make informed decisions about growth and adoption. API analytics platforms, whether open-source or commercial, offer visualization, monitoring, and alerting features that enable teams to explore data, optimize performance, and ensure robust API management. Tools like Moesif are specifically designed for API products, offering user-centric data models and advanced analytics to align API metrics with business goals, while balancing accessibility and security in a post-COVID work environment.