SignProbe is a fully server‑side client identification engine that uses a packet‑level sign spoofing technique to detect hacked clients, utility mods, and custom HUD frameworks without ever showing players a real sign, GUI, or popup. Everything happens silently, instantly, and invisibly seconds after a player joins. uses a controlled sign update packet containing a non‑existent Minecraft translation key such as, signprobe.check.key
100% Server‑Side Detection - No mods, no resource packs, no visible signs, no popups.
Invisible to Players - The fake sign is never rendered. The check completes in milliseconds.
Client Fingerprinting Engine - Detects hacked clients, utility mods, HUD frameworks, and custom menu systems.
Zero Performance Impact - Lightweight packet‑level logic designed for high‑population servers.
Instant Join‑Time Scan - Runs seconds after login for seamless moderation workflows.
Failsafe Vanilla Handling - Vanilla clients always return the raw key → guaranteed clean pass.
Custom Key Profiles - Supports multiple translation keys to detect different client families.
Webhook & Staff Alerts - Automatically notify staff when suspicious clients are detected.
100% Server‑Side Detection - No mods, no resource packs, no visible signs, no popups.
Invisible to Players - The fake sign is never rendered. The check completes in milliseconds.
Client Fingerprinting Engine - Detects hacked clients, utility mods, HUD frameworks, and custom menu systems.
Zero Performance Impact - Lightweight packet‑level logic designed for high‑population servers.
Instant Join‑Time Scan - Runs seconds after login for seamless moderation workflows.
Failsafe Vanilla Handling - Vanilla clients always return the raw key → guaranteed clean pass.
Custom Key Profiles - Supports multiple translation keys to detect different client families.
Webhook & Staff Alerts - Automatically notify staff when suspicious clients are detected.
