Json API used in CustomSkinLoader
It will be supported after CSL 13.1
LICENSE: CC 1.0 https://github.com/xfl03/CustomSkinLoaderAPI/blob/master/CustomSkinAPI/CustomSkinAPI_zh-CN.md

Mod Fix for CustomSkinLoader.
LICENSE: GPL v3

A function for Skin Server Owner to make it easier for user to add server into 'Load List'.
LICENSE: CC 1.0