It works, but it’s pretty neglected

This tool works, but it hasn’t received an update since 2013.

Functionally, NRPE can only handle a payload of 1024 bytes, which limits the amount of data that you can receive on your Nagios server. There have been a couple security reports with NRPE since the last release (See https://www.opsview.com/resources/blog/nagios-nrpe-security-vulnerability ), and it’s not clear if Nagios.com ever patched their code in response to these reports.