The info-beamer OS doesn’t use Raspbian, so you can’t install programs the depend on
apt-get or similar infrastructure usually available. What kind of information are you interested in gathering on the device?
The OS was designed to not require detailed on-device monitoring as most of the common issues are handled automatically. You don’t have to monitor available disk space for example, as that’s completely handled by the OS: It will remove old cached content if space runs low automatically.
On the other hand, info-beamer hosted already gathers a few metrics and makes them available internally. If you enable
[x] advanced/developer options on the account page, you’ll get four graphs on each device page showing fps, load, temperature and mem usage of the info-beamer process. These values are also available through the API.
For individual device realtime metrics, the device sensor API can be used to query live information from a device.
For monitoring overall device uptime/availability: Recently a Device Check API was added that can be queries by systems like nagios or similar pull based monitoring solutions.
Maybe one of those helps? If not, it should also be possible to wrap any kind of event gathering daemon into its own package service and install it on a device that way.