Prometheus is a very useful tool for monitoring web applications. In this blog post, we will see how to use it to monitor Spring Boot API response times. You have to include following dependencies in your build.gradle file: compile group: 'io.prometheus', name: 'simpleclient_hotspot', version: '0.0.26' compile group: 'io.prometheus', name: 'simpleclient_servlet', version: '0.0.26' compile group: 'io.prometheus', name: 'simpleclient', version: '0.0.26' Now you will have to expose a Rest Endpoint, so that Prometheus can collect the metrics by scraping it at regular intervals. To do that, you would have to include these Java configuration classes: @Configuration @ConditionalOnClass(CollectorRegistry.class) public class Config { private static final CollectorRegistry metricRegistry = CollectorRegistry. defaultRegistry ; @Bean ServletRegistrationBean registerPrometheusExporterServlet() { retu...