API Poller: Use the overall status of an API poller to trigger alerts (for example, if an API stops responding or expected values are not returned). See How monitored API metrics in SAM impact Node status.
API Poller Monitored Value: Set warning and critical thresholds for alerts individual values monitored by an API poller. See Configure monitored values in API pollers.
For an overview about alerts, see Use alerts to monitor your environment with the SolarWinds Platform.