This is an implementation of the Yubico OTP algorithm, used on YubiKey devices. The primary audience is developers who wish to verify YubiKey tokens in their applications, presumably as part of a multi-factor authentication scheme. Note that this is not a YubiCloud client, it's the low-level implementation. Those wishing to verify YubiKey tokens in their application will be most interested in :meth:`yubiotp.otp.decode`.
For testing and experimenting, the included yubiotp script is a command-line interface to the OTP parsing and the yubikey script simulates one or more YubiKey devices using a config file. These tools are documented by usage strings.