ClientCheck
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
ClientCheck — Mod detection & blacklist plugin for Spigot 1.21 ClientCheck detects the mods installed on connecting players and takes action against…
⬇ Download on ModrinthClientCheck — Mod detection & blacklist plugin for Spigot 1.21
ClientCheck detects the mods installed on connecting players and takes action against forbidden ones (cheat clients, X-ray tools, etc.), helping keep your server fair.
Key features:
Mod detection — Scans a player's client mods shortly after join (configurable delay) Blacklist system — Pre-configured list of common cheat/utility mods (Wurst, Impact, Meteor Client, Baritone, LiquidBounce, Killaura, X-ray, Freecam, Speedhack, and more), fully editable Whitelist exceptions — Legitimate performance mods (Sodium, Lithium, Iris, Fabric API) never flagged Configurable action — KICK, BAN, WARN, or LOG_ONLY Admin notifications — Real-time alerts for staff when a blacklisted mod is detected Logging — Console logging plus a persistent log file (date, player, UUID, mod, action) Bypass permission — Trusted players/staff can be exempted Commands — /modcheck , /modblacklist <add|remove|list>, /modcheckreload
Permissions: granular nodes (.check, .blacklist, .reload, .notify default OP; .bypass default off) Compatibility: Spigot/Paper 1.21.x
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1, 1.21.2
- 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 ClientCheckr.jar — drop this file into the mods folder
- Download size: 25 KB
- Download link checked 1 Nov 2026 — working
These come from our own check of the pack file, not from the source page.