McJtyLib is a companion mod required by almost all mods from McJty and romelo333, including RFToolsBase, RFToolsBuilder, XNet, DeepResonance, and NotEnoughWands. It is available for Forge and NeoForge across Minecraft versions 1.12.2–1.21.1.
When renting your own Minecraft server for these authors’ mods, install McJtyLib with one click from the server panel to provide their required companion library.