AltChecker

AltCheck is a mod focused on privacy and security. It provides tools to manage and verify accounts, with a comprehensive set of features to ease server administration while keeping sensitive data private.

Features

• Track player login IP usage over time
• Detect potential alts via shared IP relationships
• View grouped IP links and player history
• Session tracking (join/leave durations, online/offline status)
• Risk scoring (VPN + behavioral signal blend)
• Permission-based command access
• IP masking in chat with optional hover/click reveal (altcheck.view.ip)
• Admin utilities for hide/purge/cleanup/statistics

---

Commands

Core

• /altcheck trace <player> - Trace linked accounts for a player
• /altcheck lookup <ip> - Find players associated with an IP
• /altcheck history <player> - Show player IP history
• /altcheck list - Show grouped shared-IP relationships

Investigation (inv)

• /altcheck alts <player> - Show alternate accounts
• /altcheck ip <player> - Show known IPs for a player
• /altcheck sessions <player> [page] - Show session history (paged)
• /altcheck score <player> - Show risk score breakdown

Admin

• /altcheck purge <player> - Delete a player's stored data
• /altcheck hide <player> - Toggle player visibility in results
• /altcheck cleanup - Remove old records
• /altcheck stats - Show database statistics

Help

• /altcheck help - Show commands you can access
• /altcheck help core
• /altcheck help inv
• /altcheck help admin

Permissions

Notes:

• Access is controlled by Fabric Permissions API.
• Command visibility in help is permission-aware.

Permission	Description	Suggested Level
altcheck.use	Base access to root command	2
altcheck.trace	Use trace command	2
altcheck.lookup	Use lookup command	4
altcheck.history	Use history command	4
altcheck.list	Use list command	4
altcheck.alts	Use alts command	2
altcheck.ip	Use ip command	4
altcheck.sessions	Use sessions command	4
altcheck.score	Use score command	2
altcheck.purge	Use purge command	4
altcheck.hide	Use hide command	4
altcheck.cleanup	Use cleanup command	4
altcheck.stats	Use stats command	2
altcheck.view.ip	View hover/click full IP instead of masked-only	4