List supported item keys in client side using zabbix_agentd

With zabbix_agentd binary, it is possible to list supported item keys. This can be done with:
zabbix_agentd -p
After executing this command the result will be pure default item keys which are currently supported by this exact binary.

Be aware that in situation where zabbix_agentd.conf is hosting in default location then it will be used as an input. For example on windows if the configuration is hosted in:
c:\zabbix_agentd.conf
which contains line like:
EnableRemoteCommands=1
UserParameter=windows.build.version.number,ver
After executing again "zabbix_agentd -p" it will also print the output of UserParameter:
system.run[echo test]                        zabbix_agentd [5596]: Warning: Executing command 'echo test'
 [t|test]
windows.build.version.number                  [t|Microsoft Windows [Version 10.0.16299.309]]
Byat