YKCLIENT(1) User Commands YKCLIENT(1) (NAME) ykclient - YubiCloud (SYNOPSIS) ykclient [OPTION]... CLIENTID YUBIKEYOTP (DESCRIPTION) YUBIKEYOTP YubiCloud CLIENTID . . --help --version --debug --url URL URL "https://api.yubico.com/wsapi/2.0/verify" --ca CADIR (CA) "/usr/local/etc/CERTS" --cai CAFILE (peer) --apikey Key API HMAC / --proxy ip:port "socks5h://user:pass@127.0.0.1:1080" 0 1 OTP () 2 OTP 3 . (BUGS) . ykclient 2.15 April 2026 YKCLIENT(1)