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BS-AntiCheat

BS-AntiCheat

Movement, combat, world, inventory and packet-level cheat detection that's actually tuned not to flag your legit players. Install it, and your builders, miners and PvPers keep playing , while cheaters get caught.

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Compatibility

Minecraft: Java Edition

1.21.x

Platforms

Links

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Tags

Creators

Details

Licensed MIT
Published 6 days ago

✨ Why BSAntiCheat?

  • 🧊 Folia-ready — runs natively on Folia and Paper from the same jar (verified against a real Folia server).
  • 🎯 Calm by default — the fiddly, false-positive-prone heuristics ship off; the reliable checks are on. No flag-storm on day one.
  • 🔧 Fully calibratable — 25+ thresholds tunable live with /bsac reload, no restart.
  • 📡 Transaction-based lag compensation — real ping/pong round-trip timing, not the coarse getPing(), so high-ping players aren't punished.
  • 🪶 Tiny — ~355 KB, no bundled bloat.
  • 🌍 Bedrock & legacy aware — auto-exempts Geyser/Floodgate and (opt-in) ViaVersion clients whose physics differ.

🛡️ What it detects

Category Checks
Movement Speed, Fly, Hover, Teleport, GroundSpoof, Elytra/Riptide speed
Combat Reach, KillAura (angle + multi), AimSnap, Criticals, AutoBlock
World Nuker, FastPlace, Scaffold, FastBreak
Vehicle Boat-Fly, per-type vehicle speed
Packet AutoClicker, BadPackets, Timer, crash protection, packet-flood
XRay ore thresholds, ore/stone ratio, rare-ore combos, restricted zones
Inventory (opt-in) InventoryMove, ChestStealer, FastUse, BowSpam, AutoTotem

Movement is checked every tick (no sampling), ground state is server-authoritative (not the spoofable client flag), and grace windows handle knockback, teleports, joins and elytra landings so normal play stays clean.

⚙️ Enforcement

A violation-level (VL) system with decay drives configurable punishment tiers — run any console commands (warn, kick, ban, custom) at VL thresholds, with optional setback. Ships in report-only mode; flip the switch when you're ready.

🔌 Requirements

  • Paper or Folia 1.21.x
  • PacketEvents — required for the packet-level checks (AutoClicker, BadPackets, Timer, Crasher, PacketFlood) and lag-transaction system. Everything else works without it.

Optional: LuckPerms (group whitelist), PlaceholderAPI, Geyser/Floodgate, ViaVersion.

🚀 Quick start

  1. Drop the jar in plugins/ (plus PacketEvents).
  2. Start the server.
  3. Tune config.yml, apply with /bsac reload, and enable punishments when you're happy.

Calibrate for your server: set debug_mode: true, keep punishments off, watch the debug values while playing, tune anticheat.thresholds.*, then reload. Done.

📋 Commands & permissions

/bsac, /movealerts, /xrayalerts, /acsilent, /acwhitelist, /xrayores — admin/manage permissions, all with aliases. PlaceholderAPI: %bsanticheat_total%, %bsanticheat_vl_<check>%.

Actively developed. Prediction-level combat detection and reworked opt-in heuristics are on the roadmap. Feedback and bug reports welcome!