Zeffut Mod Checker
Reports a player's installed mods to the server so admins can allow or ban mods and kick anyone using a banned one, with a handshake so the client only…
⬇ Download on ModrinthModChecker
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)
/modsadmin 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.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 26.1.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as modchecker-neoforge-26.1.2-2.1.0+26.1.2.jar — drop this file into the mods folder
- Download size: 35 KB
- Download link checked 8 Sept 2026 — working
These come from our own check of the pack file, not from the source page.