The status of the APIs (all API versions) are denoted in Availability of APIs tabular view.
This indicates the status of the API. There are two values for the API. Those are Available and Limited.
Available - This status indicates that the API is having traffic with normal successful invocations. By default, if an API gets successful invocations at least for one out of 5 invocations within 30000 milliseconds, the status of the API becomes Available.
Limited - If an API gets an alert due to one of the reasons indicated in AvailabilityofAPIs (healthmonitoring), API status changed to “Limited".