@Rohit Boddu - Thanks again for your query. Will look forward to hear back in case you have further questions once you have testing done on your side.
Resurfacing the information from the comments here for broader community usage, in case the query relates to monitoring leveraging Application Insights Availability test and other monitoring options with in Azure Monitor.
Generally you can monitor the availability of any website using Availability tests in Application Insights, please refer here for more details. You can further configure alerts for them.
You can also invoke a webhook and write custom code to monitor the API's
Pertaining to Spring Boot Framework monitoring you can configure Spring Boot Initializer app to use Application Insights.
If the query was pertaining to monitor Published API's with in Azure API Management , please refer to this documentation.
Hope this information helps, please feel free to revert back if you have any further queries. Thank you