Glyr comes both in a commandline interface tool and as a C library, both with an easy to use interface. The sort of metadata glyr is searching (and downloading) is usually the data you see in your music player. And indeed, originally it was written to serve as internally library for a music player, but has been extended to work as a standalone program.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.