YKCLIENT(1)                      User Commands                     YKCLIENT(1)

NAME
       ykclient - YubiCloud One-Time-Password Validation Client

SYNOPSIS
       ykclient [OPTION]... CLIENTID YUBIKEYOTP

DESCRIPTION
       Validate the YUBIKEYOTP one-time-password against the YubiCloud using
       CLIENTID as the client identifier.

       Mandatory arguments to long options are mandatory for short options
       too.

       --help Display this help screen

       --version
              Display version information

       --debug
              Print debugging information

       --url URL
              Validation service URL, for example,
              "https://api.yubico.com/wsapi/2.0/verify"

       --ca CADIR
              Path to directory containing Certificate Authoritity, e.g.,
              "/usr/local/etc/CERTS"

       --cai CAFILE
              Path to a file holding one or more certificated to verify the
              peer with

       --apikey Key
              API key for HMAC validation of request/response

       --proxy ip:port
              Connect to validation service through a proxy, e.g.,
              "socks5h://user:pass@127.0.0.1:1080"

       Exit status is 0 on success, 1 if there is a hard failure, 2 if the OTP
       was replayed, 3 for other soft OTP-related failures.

REPORTING BUGS
       Report bugs at <https://github.com/Yubico/yubico-c-client>.

ykclient 2.15                     March 2024                       YKCLIENT(1)