Package: Mobs Redo
I use mob_horse, mobs_animals, and mobs_monster. I like these mods, and these mods require this API, so I like this API.
Be aware that it is not compatible with mobkit. Check your mod list before adding this one.
I use mobkit and mob_redo together, and another one (can't remember his name).
From Minetest-server 5.? to 5.3. I not yet tested with version 5.4.
You should write in the forum section what is you problem, because "it's works" for us.