Hello,
you have to use the command “gpg” which stands for GnuPG which is the crypto engine behind Kleopatra.
For a few commands you can run “gpg --help”. If you want to explore more commands and options you can visit https://www.gnupg.org/documentation/manuals/gnupg/.
I didn’t find an option to run commands in silent mode but you could search for a way to redirect the output.
With regards,
Christoph