Lost Keys

Lost Keys

Temporarily rebind a client's controls from the server!

by
900 Downloads
fabricpaperspigotutility
Rent Server with this Mod

About this Mod

Lost Keys

required on both server and client (although it shouldnt crash anything if only client/only server has it)

Server Side Commands:

it adds a server side command /lost_keys:override <player> <binding> <key> that temporarily (until the player relogs) replaces the key for a given binding

for instance, /lost_keys:override Steve key.forward key.keyboard.b will mean Steve has to press B to walk forwards instead of W (or whatever they have it set to)

the <key> can also be set to whatever the value of another binding is, so /lost_keys:override Steve key.drop key.forward will mean whenever Steve walks forwards, they also drop whatever they're holding

to clear an override, set the <key> to default (or itself), to disable a key, set the <key> to none (or any invalid key), to force a <key> to be pressed, set it to pressed

the <binding> can also be all, which can be used to clear all overrides at once: /lost_keys:override <player> all default, disable all keys: /lost_keys:override <player> all none (then specific keys can be enabled by setting them to themselves) , or cause a mess: /lost_keys:override <player> all key.keyboard.a

you can also set keybindings to run commands, like so: /lost_keys:bind_command <player> <binding> <command>, the command does not include the /, so: /lost_keys:bind_command @s key.forward say hi, and the binding can also be keyboard keys. commands are run by the client, so commands that require op won't work on an unopped player

Client Side Commands:

it also adds two client side commands, /lost_keys:lognext, which tells you the name of the key you press next (and binding if there is one), so you can easily figure out how to override what you want

and /lost_keys:list, which tells you all applied overrides

Notes:

not all keys work, because minecraft is inconsistent, but all the important ones like movement and attacking do. Likewise some keys will not work properly with all overrides

Plugin Version:

the permission node is lost_keys.override, and it only works with specifically mentioned players and @a - so /lost_keys:override Steve key.forward none works, but /lost_keys:override @p key.forward none or /execute as Steve run lost_keys:override @s key.forward none do not! this is an important difference!

the same limitations apply for /lost_keys:bind_command, and it's permission node is lost_keys.bind_command

Available Versions

Lost Keys 1.0.1release
MC 1.21.6, 1.21.7, 1.21.8fabric
June 25, 2025
Lost Keys 1.0.1release
MC 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5fabric
June 25, 2025
Lost Keys 1.0.0release
MC 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5fabric
February 16, 2025
[Plugin] Lost Keys 1.0release
MC 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4paper, spigot
February 15, 2025

How to Install Lost Keys on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.8).

3

Install Mod

Open the mod browser in the dashboard and search for "Lost Keys". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricpaperspigot

Minecraft Versions

1.21.8, 1.21.7, 1.21.6 (+8 more)

Server-side

Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Lost Keys server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.8). You can switch loaders with one click in the panel.

Is Lost Keys compatible with fabric and paper and spigot?

Lost Keys officially supports fabric, paper, spigot for Minecraft 1.21.8, 1.21.7, 1.21.6. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Lost Keys – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Lost Keys consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install Lost Keys with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
GNU Lesser General Public License v3.0 only
Server-side
Unsupported

Supported Versions

1.21.81.21.71.21.61.21.51.21.41.21.31.21.21.21.11.211.20.6+1 more