If you want a server setup for the Any mod pack with zero effort, get a server with BisectHosting and receive 25% off your first month as a new customer using the code kreezxil

Port of https://www.curseforge.com/minecraft/mc-mods/fence-jumper by TheRealp455w0rd to 1.16.4+ under the MIT license.

When walls and fences hold you, fret not, now you can jump them!

This mod is client side.   Beginning version 1.13.1 the mod now emits a message to servers that it exists.

No need to ask for permissions, just add it.