Health check for Jira, Confluence and Crowd server

The customer’s operations needs to monitor Jira, Confluence and Crowd health-status. Is it sufficient to monitor the /status page? Does the /status change to Error in case for example the database i down?

I have read the following so far:

But neither clearly states when Error is returned.

Found out the following can be used for Jira:

Haven’t found an equivalent for Confluence or Crowd yet