I use the getOrganizationDevicesAvailabilitiesChangeHistory endpoint, it does work. It has two separate documentation entries, one in Early Access, I'd guess the endpoint is being tweaked. https://developer.cisco.com/meraki/api-v1/get-organization-devices-availabilities-change-history/ https://developer.cisco.com/meraki/api-v1/api-reference-early-access-api-platform-monitor-devices-availabilities-changehistory-get-organization-devices-availabilities-change-history/ Using device availability is the option I'd recommend. You do need to periodically grab the status 'now', then you can use the change history to calculate from that point. This gets current status, updated every 5 minutes... https://developer.cisco.com/meraki/api-v1/get-organization-devices-availabilities/ If you only want to check site reachability [defined as an MX responding], you might find it simplest to just ping your sites every 60 seconds.
... View more