promotional bannermobile promotional banner

Zeffut Mod Checker

Reports each player's installed mods to the server so admins can allow or ban mods and kick anyone using a banned one - with a privacy-preserving handshake.

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.


Also available on Modrinth

The Zeffut Mod Checker Team

profile avatar
Owner
  • 5
    Projects
  • 80
    Downloads

More from ZeffutView all

  • Flashback Settings project image

    Flashback Settings

    Adds missing settings to the Flashback mod - starting with choosing the replay save folder.

    • 0
    • July 10, 2026
  • MultiView - Flashback Addon project image

    MultiView - Flashback Addon

    Merges multiple Flashback replays from the same session into one unified omniscient-observer replay - union of chunks, players and events from each POV.

    • 0
    • July 10, 2026
  • Flashback Server project image

    Flashback Server

    Server-side Flashback replay recording for Paper - zero dependencies, Folia-ready, with a rolling clip system. No client mod required for recorded players.

    • 80
    • July 10, 2026
  • Flashback Turbo project image

    Flashback Turbo

    Field-proven faster Flashback exports without quality loss - up to ~11x faster, ~8.5s for a 1080p60 clip on NVIDIA.

    • 0
    • July 10, 2026
  • Flashback Settings project image

    Flashback Settings

    Adds missing settings to the Flashback mod - starting with choosing the replay save folder.

    • 0
    • July 10, 2026
  • MultiView - Flashback Addon project image

    MultiView - Flashback Addon

    Merges multiple Flashback replays from the same session into one unified omniscient-observer replay - union of chunks, players and events from each POV.

    • 0
    • July 10, 2026
  • Flashback Server project image

    Flashback Server

    Server-side Flashback replay recording for Paper - zero dependencies, Folia-ready, with a rolling clip system. No client mod required for recorded players.

    • 80
    • July 10, 2026
  • Flashback Turbo project image

    Flashback Turbo

    Field-proven faster Flashback exports without quality loss - up to ~11x faster, ~8.5s for a 1080p60 clip on NVIDIA.

    • 0
    • July 10, 2026