Tabla de Contenidos: “…Part 3: Deep Dive into Key Metrics for API Products -- Chapter 10: Infrastructure Metrics -- Key success factors (KSFs) for APIs -- Infrastructure as the foundation for API analytics -- Performance metrics -- Uptime and availability -- Errors per minute -- Average and maximum latency -- 90th-percentile latency by customer -- Usage metrics -- Requests Per Minute (RPM) -- CPU usage -- Memory usage -- Error code distribution -- Concurrent connections -- Top endpoints -- Usage by segments -- Reliability metrics -- Mean Time to Failure (MTTF) -- MTTR -- MTBR -- The Rate of Occurrence of Failure (ROCOF) -- Probability of Failure on Demand (POFOD) -- Summary -- Chapter 11: API Product Metrics -- Defining product metrics -- Discovery -- Unique visitors -- Page views -- Sign-ups by channel -- Reading level or text complexity analysis -- Link validation -- Search keyword Analysis -- Engagement -- Average time on page -- Bounce rate -- Engagement with homegrown tools -- Customer engagement score (CES) -- Acquisition -- Daily user sign-ups - new users -- Time to first hello world (TTFHW) -- Software development kit and version adoption -- Activation -- Time to first transaction (TFT) -- Time to value (TTV) -- Cohort analysis -- DAU/MAU/WAU -- Retention -- Recurring daily, weekly, and monthly usage -- Customer retention -- API calls per business transaction -- Experience -- Unique API consumers -- Top customers by API usage -- Conversion rate -- Daily support tickets per active users -- CSAT -- Net Promoter Score (NPS) -- Summary -- Chapter 12: Business Metrics -- Defining business metrics -- Measuring revenue -- MRR -- Revenue versus forecast -- ARPA -- Average transaction value (ATV) -- Revenue by acquisition channel -- Adoption tracking -- SDK adoption -- Feature adoption -- Churn analysis -- Churn rate -- Cohort retention -- Optimizing for growth…”