Lastest version of API Library for Mautic 2.16.3 is API Libraray verion 2.16.1?

Your software
My Mautic version is: 2.16.3
My PHP version is: 5.6.40
My Database type and version is: 5.0.11

Your problem

Is the latest API Library version for Mautic 2.16.3 the following version?

Also, the API Library 3.0 version won’t work with Mautic 2?

Thank you!