Windows API’s

Components based on Microsoft’s COM/ActiveX technology. See releases for installers and detailed documentation.

The x64 COM API installers do not register with Internet Explorer ActiveX components. Integrators and Developers looking to support the COM API in an Web-based environment are recommended to use the x86 (32-bit) version.

Windows Client COM API

The Client API for YubiKey 2.2 and later versions, featuring support for device serial numbers and challenge-response.

Windows Server COM API

Server support functionality for challenge-response, Yubico OTP and OATH-HOTP validation.