Real time notifications (on a minute or second level)

I have checked out the Custom Alerts plugin and played around in the development pages - while the Custom Alerts sends daily reports, what I need is instant reaction on a minute or second level. From my research, the least “entity” supported in Piwik’s Tasks and Schedule is hourly() which is not enough for my case.
So, how can we schedule something in Piwik to alert us on a minute-by-minute or a second-by-second level?
Note: I’m not worried about consuming server resources as accomplishing the task has higher priority so server-intensive solutions are welcome too, as long as the issue is solved.