The API is BSD licensed[1]. Anyone can use it, it is just not some consortium standard, but anyone can fork it.<p><a href="https:&#x2F;&#x2F;github.com&#x2F;ValveSoftware&#x2F;openvr" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;ValveSoftware&#x2F;openvr</a>