Spawn protection?

Hello everyone! I know they exist, but I don’t know if they’re custom or not. I’m looking for a protection that’ll let me protect spawn from grief, but still allow players to interact with blocks at spawn. (Maybe a PC from Pixelmon, ect). Some protection plugins don’t allow this, as you’re required to claim a chunk. My apologies if there’s already a forum on this, but I can’t find it anywhere. Thanks in advance!

Archikai

It’s in it’s early stages and a little bit complex, but there is a wiki you can look at.