Employee Engagement APIs

Hi folks, What APIs are supposed to be used for Employee Engagement? There seems to be some EX related APIs (for example https://survey.qualtrics.com/WRAPI/ThreeSixty/docs.php#360_Requests_2.5) but these seem to be v2 APIs. Im not entirely sure if EX type APIs are available in v3 or if the v2.5 ones listed there are what are supposed to be used? Cheers, Mark