Depends: CoserverAPI
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How does it work?

You have a lot of servers (~100) and plugins like ViaVersion, ProtocolLib, etc. which updates very often.
You don't want to manually update the plugin on all your servers after every update. What to do?
MultiLoaderPluginDownloader is one of solutions (maybe only one).
You probably have a bungeecord. You can put this plugin(VV, PL, HDB) on a special folder in your bungeecord server and download/update it from bukkit(spigot/paper, etc) while the server is enabling.

Your servers:

Bungeecord MLPD_plugins folder:

useful folder:

How to use it?

Bungeecord side:
create folder 'MLPD_plugins' and put your plugin here

Bukkit/Spigot side:
in configuration file specify the path to the plugin

Configuration be like:

folder1:
- plugin1
- plugin2
- plugin3 $usesubfolder subfolder1
- plugin4
folder2:
- plugin5
- plugin6 $nocfg
folder3: [plugin7, plugin8, plugin9]

list.yml:

# Minigames configuration:
engine:
- ProtocolLib
- ViaVersion
- Cititzens
- HeadDatabase $usesubfolder more
- anotherplugins
useful:
- aSomePl $usesubfolder minigames
- aMGpl $usesubfolder bedwars
#or
- aMGpl $usesubfolder skywars


# RPG configuration:
useful:
- aSomePl $usesubfolder rpg
- aMyRPG
# in aMyRPG case whole folder will be downloaded because subfolder _default is not exists
- etc

Easy API:

//Automatically checks new version of the plugin or config and in case if old updates it
MLPD.from(folder).using(plugin);
MLPD.from(folder).using_cfgs(folder_with_configs, subfolder);
MLPD.from(folder).using_cfgs(folder_with_configs, null);

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If you have some troubles pls contact me with discord
https://discord.gg/TWEy37Frh2
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