ModChecker

ModChecker reports each player's installed mods to the server. Admins can mark mods as allowed or banned, and players carrying a banned mod are kicked.

How it works

A handshake keeps it clean: when you join, the server announces itself (modchecker:hello), and only then does the client send its mod list (modchecker:modlist). A vanilla client ignores the announcement, and the client never reveals its mod list to a server that doesn't run ModChecker.

Features

• Client mod for Fabric and NeoForge
• Minecraft 1.21.11, 26.1, 26.1.1, 26.1.2
• Server side as a Paper/Purpur plugin and a Velocity proxy plugin (enforcement at the proxy)
• /mods admin GUI and commands: list, inspect a player, allow / ban / reset a mod
• Configurable kick messages, optional "kick players without the mod", permission bypass

Server side

Install the matching server plugin to manage and enforce the mod list.