ModsFinder

Locksmith

by Z2SIX

Locksmith lets players lock doors, chests and other blocks with physical keys instead of permissions, so access follows the key a player carries.

NeoForgeClient and serverCustom license1.21.1

What it does

Players craft an iron key from one iron ingot and two iron nuggets, then right-click a door or chest while holding the key to register it. The key is then prompted for a secret passphrase, and a right-click on a door or chest with that registered key locks it. Players without a matching key cannot open a locked block.

Doors, chests and trapped chests from vanilla work with locking out of the box. Server administrators choose exactly which blocks can be locked, and the list can include blocks added by other mods through a simple configuration. Lock behavior can also be set through profiles, and locked blocks are made invulnerable, so their hardness and explosion resistance are not changed.

Duplicate keys are made with a minting recipe from an existing registered key, which lets several players share access. Locksmith is server-authoritative and is built for multiplayer. Curios is supported with a key slot. The mod is released under the Z2SIX Mod License, so it is not open source, and its source code and issue tracker are public. Files cover 1.21.1 for NeoForge only, and the environment is client and server.

Key features

  1. Physical key locks

    Locks are opened by a key that a player carries, replacing permission-based access.

  2. Secret passphrase keys

    Each iron key is registered with a passphrase entered during setup, and duplicates are made from a registered key.

  3. Configurable lockable blocks

    Vanilla and modded blocks can be added to the lockable list on the server side, with optional auto-opening and closing for doors.

  4. Server-authoritative locking

    Lock state is checked on the server, so it stays consistent in multiplayer, with Curios support through a key slot.

Compatibility

Latest build for each game version and loader.

1.21.11.3.3.5
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Use cases

Who it’s for: Server owners and players who want key-based locks on doors and chests in NeoForge 1.21.1 worlds, and modpack authors who need lockable modded blocks.

Questions

Does Locksmith need a server install?

Locksmith runs on client and server, so the server and every player need the mod, and the server controls which blocks are lockable.

Can several players open the same locked door?

Yes. Duplicate keys are made with the minting recipe from a registered key, so each player who needs access can hold one.

Does Locksmith work with Curios?

Yes. Curios compatibility adds a key slot, so a key can be carried there.

In the catalog

Locksmith is one of 19,031 Adventure mods on ModsFinder, and one of 8,588 Adventure mods for NeoForge. 32,366 mods support Minecraft 1.21.1.

Adventure mods19,031NeoForge modsMods for 1.21.132,366

More from Z2SIX

All projects
EZ Actions1.19.2 – 1.21.1Timeline1.20.1 – 1.21.3Villager Overhaul1.21.1Feathered Friend1.20.1 – 1.21.1Sketchbook1.21.1EZ Emerald Pouch1.21.1

Similar mods

Sound Physics Remastered1.19 – 26.3Advancement Plaques1.12.2 – 26.3JourneyMap1.7.10 – 26.3Exposure1.19.2 – 1.21.1Boat Item View1.16.5 – 26.3Shoulder Surfing Reloaded1.7.10 – 26.3

What the author says

Allows the locking of blocks using physical keys instead of permissions. By default, vanilla doors, chests, and trapped chests are supported. Additional blocks — including modded ones — can be configured server-side.
Z2SIX, on the Modrinth page

Official listing

Owner
Z2SIX
Published
2026-01-03
Updated on Modrinth
2026-07-09
Facts verified
2026-10-15

Tags

AdventureGame mechanicsStorageUtility
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