khard is a CLI CardDAV contacts manager.
It uses vdirsyncer on the back-end to synchronize contacts locally to .vcf files.

Integrates with mutt.

Documentation

github https://github.com/scheibler/khard

Locations

~/.config/khard/khard.conf config

2020 tutorial https://jpmens.net/2020/04/12/rediscovering-carddav/

khard install

khard configuration

khard usage