Ok, I managed to make it work. I am using OpenSuse Tumbleweed but it shouldn’t make any difference on other versions
- import the rpm key
sudo rpm --import https://d2t3ff60b2tol4.cloudfront.net/repomd.xml.key
- Add the new repository from the Yast2 interface. It will fail due permissions, but that’s fine. Accept it and save it.
I personally used the latest fedora version, so the url was http://yum.insynchq.com/fedora/24.
- open the repository in vim located in /etc/zypp/repos.d/ and add these two lines
Now you should be able to list and install