Uptime and availability
Although customer applications depend on the performance of your APIs, the choices and nuances of your infrastructure choices that make your APIs performant are abstracted from your customers. Uptime and availability are the most outward-facing of all infrastructure metrics. Most companies would publish a status page with uptimes and availability stats of their APIs. These pages are generated using a ping service.
The availability of a service is the probability of the system being available to the user over a period of time. Since availability is the likelihood of the system being available, it helps you understand the reliability of your APIs at a wider scale and how it might impact the user experience.
Uptime measures the reliability of an API as a percentage of time the service has been working and is ready for use. Uptime is used as the go-to standard for measuring the availability of APIs. In the following screenshot, you can see how Stripe displays...
