We provide Web API Clients in different languages to allow you to easily check and validate YubiKey One-Time Passwords. Please note: Third-Party clients are not written by Yubico.
A PHP class allows you to easily check YubiKey OTP’s from your PHP web site.
Yubico C client library is a shared library written in C that performs online YubiKey OTP validation.
Integrate YubiKey OTP verification into your Java code.
This library contains a C# implementation of YubiKey OTP verification.
An AnyEvent based Perl extension for validating YubiKey OTPs.