Lamp's Utils
by lampyt
Lamp's Utils is a Fabric library mod for 1.21.9 – 1.21.11 that provides shared block registration, command registration and an in-game configuration screen for other mods.
What it does
Lamp's Utils is a library mod, so its main role is to supply code that other mods build on. It registers blocks and commands through its own helper classes, and it adds an in-game configuration screen that is built on oωo and reached through Mod Menu. Balm, Fabric API and oωo (owo-lib) are required, and Mod Menu is optional for the settings screen.
The mod also contains smaller features of its own. A decorative Error Block is registered under the lamps-utils namespace, and an HTTP command fetches a data URL and shows the result in chat, with settings that control how it is used. Warnings for text length limits are part of the same set of tools. The mod is released under CC0 1.0 Universal and is open source, and its source code, issue tracker and wiki are public.
Client and server means the server and every player need the mod. Files cover 1.21.9, 1.21.10 and 1.21.11, and v1.7.0 for 1.21.11 is the latest release, published on 2026-05-15. The project was first published on 2026-02-14.
Key features
Shared block registration
Blocks are registered through a central class, which keeps block setup in one place for the mod's content.
Command registration
Commands are added through a dedicated registration class, so new commands follow the same pattern.
Error Block
A decorative and utility block is registered under the lamps-utils identifier.
HTTP fetch command
A command fetches a data URL and displays the response in chat, with a configurable safety option.
In-game configuration
Settings open from Mod Menu in a screen built on oωo, so players do not need to edit files by hand.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 3
Optional 1
How it compares
Circuit Core is a Fabric library for 1.21.1 – 1.21.11 that runs on client and server and is not open source, as it is licensed under All rights reserved. UI Timer Lib is client-side only, covers 1.21.6 – 1.21.11 and is released under the MIT License, so it is not open source in the same sense as Lamp's Utils. Monkey Utils is open source under the MIT License, but it is server-side only and targets 1.21 – 1.21.11.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Lamp's Utils | Fabric | 1.21.9 – 1.21.11 | Client and server | 2026-05-15 |
| Circuit Core | Fabric | 1.21.1 – 1.21.11 | Client and server | 2026-08-22 |
| UI Timer Lib | Fabric | 1.21.6 – 1.21.11 | Client-side only | 2026-06-12 |
| Monkey Utils | Fabric | 1.21 – 1.21.11 | Server-side only | 2026-01-11 |
Questions
Does Lamp's Utils need Fabric API?
Does the server need Lamp's Utils?
Is the configuration screen optional?
In the catalog
Lamp's Utils is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from lampyt
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What the author says
A lightweight utility and library mod for Fabric (Minecraft 1.21.11). Claude AI - Created this README.md and helped me code the mod (its not fully vibecoded don't worry).
Official listing
- Modrinth page
- modrinth.com/mod/lamps-utils
- Owner
- lampyt
- Published
- 2026-02-14
- Updated on Modrinth
- 2026-05-15
- Facts verified
- 2026-10-15