**_NeuralAntiCheat_**
\nA self-learning, packet-based anticheat plugin for Paper 1.21.1<\/p>\n
**Overview**
\nNeuralAntiCheat is a modern anticheat plugin built from the ground up for Paper 1.21.1. Unlike traditional anticheats that rely on simple threshold checks, NeuralAntiCheat combines real-time packet interception with a built-in neural network that learns from every player session \u2014 getting smarter over time.
\nThe plugin requires ProtocolLib to intercept raw client packets before they are processed by the server. All checks run on a dedicated async thread pool, meaning zero TPS impact on your main server thread regardless of player count.<\/p>\n
**Core Features**<\/p>\n
Packet-Based Analysis \u2014 Intercepts raw client\u2192server packets via ProtocolLib. Checks analyze actual network data, not just Bukkit events, giving far more accurate detection with less overhead.
\nFully Asynchronous \u2014 Every check runs on a dedicated NeuralAC-Check thread pool that scales to CPU core count. The main server thread is never touched during check execution.
\nLag Compensation \u2014 Dynamic ping buffer on Reach checks. Players above 300ms ping are excluded from movement checks entirely. Violation weight is scaled down for laggy connections.
\nNeural Engine (MLP 16\u219232\u219216\u21922) \u2014 A pure-Java multilayer perceptron trained on 800 synthetic sessions. Analyzes 16 behavioral features per player. Score near 1.0 = legitimate, near 0.0 = cheating.
\nPredictive Movement \u2014 FlightCheck and SpeedCheck simulate vanilla Minecraft physics each tick: gravity (0.08\/tick), drag (0.98), potion modifiers, surface friction. Flags deviation from predicted trajectory rather than a raw threshold.<\/p>\n
**Checks** (16 total)
\nCombat
\nKillAura \u2014 detects auto-attack hacks by analyzing attack angles (flags if consistently above 75\u00b0), multi-target switching patterns, and inhuman CPS with near-zero variance.
\nReach \u2014 flags hits beyond 3.05 blocks. Dynamically adds a ping buffer so high-latency players don’t get false flagged.
\nAutoArmor \u2014 detects instant 0-tick armor equipping that no human hand can physically perform.
\nFastBow \u2014 flags bows released in under 3 ticks, which is physically impossible with a real bowstring draw.
\nAntiKnockback \u2014 detects near-zero velocity after receiving a hit, meaning the client is silently ignoring knockback packets.Movement
\nFlight \u2014 a predictive physics engine simulates vanilla gravity every single tick. If the player’s actual Y position deviates more than 0.5 blocks above the predicted trajectory, it flags. No more false positives from jumps or hills.
\nSpeed \u2014 calculates the exact allowed horizontal speed based on sprint state, active potions, and surface type. Flags anything more than 15% above that.
\nJesus \u2014 flags players standing on water for more than 12 consecutive ticks without sinking, which is impossible in vanilla.
\nSpider \u2014 detects wall-climbing by requiring three conditions simultaneously: upward motion, near-zero horizontal speed (so jumping next to a wall doesn’t count), and adjacency to a solid wall for 5+ consecutive ticks.
\nNoFall \u2014 tracks what percentage of falls over 4 blocks actually result in damage. Flags if the player takes damage less than 25% of the time.
\nPhase \u2014 detects Noclip and Phase hacks by checking if the player is inside a solid block for 3 or more consecutive ticks.
\nTimer \u2014 measures how fast movement packets arrive. Flags if packets come in more than 15% faster than the vanilla standard of 50ms per tick.Player
\nFastPlace \u2014 uses a rolling 1-second window. Vanilla holding RMB places about 14\u201316 blocks per second. The check allows up to 16 and flags at 17+, so normal building never triggers it.
\nFastBreak \u2014 flags more than 25 block breaks per second, which is above the maximum achievable with Efficiency V and Haste II combined.
\nScaffold \u2014 detects auto-bridging by flagging if more than 70% of block placements happen while moving at high speed without looking down.
\nInventoryMove \u2014 flags movement faster than 0.5 m\/s while the inventory screen is open, which is impossible in the vanilla client.<\/p>\n
**Commands** **Installation**<\/p>\n 1. Place ProtocolLib 5.3.0 in your plugins\/ folder **Requires**: Paper 1.21.1 \u00b7 Java 21 \u00b7 ProtocolLib 5.3.0<\/p>\n","protected":false},"excerpt":{"rendered":" This anti-cheat uses neural networks; it automatically detects cheaters and studies their mistakes and kicks. It can be trained. The plugin requires ProtocolLib.<\/p>\n","protected":false},"featured_media":110152,"template":"","meta":{"_minecraft_slug":"neuralanticheat","_minecraft_project_id":"8zisXSWr","_minecraft_author":"wuesty","_minecraft_license":"MIT","_minecraft_downloads":146,"_minecraft_follows":2,"_minecraft_client_side":"unsupported","_minecraft_server_side":"required","_minecraft_storage_type":"zip","_minecraft_archive_name":"neuralanticheat.zip","_minecraft_size_bytes":655290,"_minecraft_version_count":2,"_minecraft_updated_at":"2026-05-15T18:43:02.205017Z","_minecraft_date_created":"2026-03-11T02:01:37.824312Z","_minecraft_date_modified":"2026-03-15T04:31:25.285024Z","_minecraft_project_url":"https:\/\/modrinth.com\/mod\/neuralanticheat","_minecraft_icon_attachment_id":110152,"_minecraft_imported_at":"2026-06-06T11:21:22+00:00","_minecraft_import_hash":"92553054e8e8b75c6de2fd612ec2aff4","_minecraft_versions":"","_minecraft_links":"","_minecraft_gallery":"","_minecraft_api_metadata":""},"mod_category":[124,89,126,127,128,867,129,92],"mod_loader":[130,132,133,134],"minecraft_version":[62,37,40,41,73,74,38,78,79,80,81,82],"class_list":["post-110151","mod","type-mod","status-publish","has-post-thumbnail","hentry","mod_category-bukkit","mod_category-game-mechanics","mod_category-management","mod_category-paper","mod_category-purpur","mod_category-social","mod_category-spigot","mod_category-utility","mod_loader-bukkit","mod_loader-paper","mod_loader-purpur","mod_loader-spigot","minecraft_version-1-21","minecraft_version-1-21-1","minecraft_version-1-21-10","minecraft_version-1-21-11","minecraft_version-1-21-2","minecraft_version-1-21-3","minecraft_version-1-21-4","minecraft_version-1-21-5","minecraft_version-1-21-6","minecraft_version-1-21-7","minecraft_version-1-21-8","minecraft_version-1-21-9"],"yoast_head":"\n
\n\/nac info nac.admin Plugin status, neural engine state
\n\/nac flags
\n\/nac whitelist
\n\/nac train cheat|legit
\n\/nac reload nac.adminReload config without restart
\n\/nac alerts nac.alertsToggle alert visibility for yourself<\/p>\n
\n2. Place NeuralAntiCheat-2.0.0.jar in your plugins\/ folder
\n3. Start the server \u2014 neural engine pre-trains automatically on first launch
\n4. Updating from v1.x: delete plugins\/NeuralAntiCheat\/neural\/model.dat before starting<\/p>\n