It's easy and fast ! Here is how you can do it, step by step.
Once installed, just launch the Technic Launcher, and authenticate using your Minecraft Account.
Type "Clapity" in the Search field, and bam !
Hit "Install", and see the magic happen.
And it's done ! You're all set !
Our server will automatically be in your Servers List, but in case you need the address, it's simple : mc.clapity.eu