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Shared Player Data

A server-side Fabric mod that allows selected online players to share the same persistent player profile data through explicit administrator binding.

Overview

Shared Player Data lets server administrators bind players together so that they use a shared player data profile.

After players are bound, they share the same persistent gameplay state, including vanilla player data such as inventory, position, experience, health, statistics, advancements, and related saved profile data.

Only one player from the same bound group may be online at the same time. If another player from the same group attempts to join while the shared profile is already in use, the join is rejected with the vanilla duplicate-login message.

Key Features

Bind two online players with a simple command
Bound players share the same persistent player profile
Only one player from the same bound group can be online at once
Uses the vanilla duplicate-login disconnect message when a bound profile is already in use
Supports online-player name suggestions for commands
Automatically saves binding configuration
Synchronizes operator status within bound groups
Designed for dedicated servers
No client-side installation required

Commands

/playerbind <name1> <name2>

Behavior

Both players must be online
<name1> remains online
<name2> is bound to the same shared profile group and then disconnected
The command requires level 4 permission
The command can be used by level 4 operators, the server console, and RCON

Restrictions

The first and second player cannot be the same player
A player cannot bind themselves as the second target

Operator Synchronization

When players are in the same bound group, their operator status is synchronized.

If one member of the group is granted operator status, the other known members of the group will also receive operator status.

If one member of the group is removed from the operator list, the other known members of the group will also be removed from the operator list.

Multiplayer Behavior

Bound players share one persistent gameplay profile
Only one bound player may use the shared profile at a time
Other players in the same bound group receive the vanilla duplicate-login disconnect message while the profile is in use
Players outside the bound group are unaffected

Server Safety

Server-side only
Dedicated-server focused
No client mod required
Does not require players to install anything
Does not change player authentication identity
Keeps real player accounts separate while sharing bound gameplay data
Prevents simultaneous access to the same shared profile

Configuration

The mod stores its configuration in:

config/shared-player-data.json

Bindings created through commands are saved automatically.

Manual configuration edits should be made while the server is stopped.

Supported Versions

Minecraft 26.1.2
Fabric Loader 0.19.2+
Fabric API 0.150.0+
Java 25

License

MIT