Player API

Player API core is an Minecraft Forge core mod which gives

• client mods access to the client classes "EntityPlayerSP" aka "blk" and "EntityPlayerMP" aka "mw"
• server mods access to the server class and "EntityPlayerMP" aka "mw"

while minimizing conflicts between mods.

Credit

Player API was made by Divisor and can be found on CurseForge and on the Minecraft Forum (both via Wayback Machine).