A very simple mod that allows players to jump on walls and fences. The blocks which can be jumped over can be determinated by the fenceplayerupper:boost_jump block tag. This mod requires the Fabric API and doesn't need to be installed in the client (unless you want to fence player up on singleplayer).
This mod is available for download on the following services:
This mod is licensed under the MIT license. You can freely include the mod on any modpack with no permission. Usage of this mod's code on other projects is allowed as long as attribution is given.