Error-Server
by Error39k9k
Error-Server brings server-style economy mechanics, such as coins, money and a clickable shop, into singleplayer worlds and Essential multiplayer sessions.
What it does
The mod provides a money system and a coin system, with 100 money exchangeable for 1 coin. Players can buy and sell items through a clickable GUI shop, so trade does not rely on commands. Building blocks are included alongside the economy features. Server-style mechanics can run in a singleplayer world or an Essential multiplayer session, and a Polish translation of the mod is available.
Chat prefixes can be decorated, and a permission hierarchy controls what each rank may do. The author describes the project as under active development. Fabric API is required. The mod is server-side only, so players join without installing it, and it is released under the MIT License without being open source. Builds are published for Fabric, for 1.20.1 only, with file 1.3B as the latest, dated 2026-06-08.
Key features
Money and coins
Money and coins are two currencies, with 100 money converting to 1 coin.
Clickable GUI shop
Items can be bought and sold through a shop screen opened by clicking, rather than through commands.
Decorated chat prefixes
Chat prefixes can be styled, and a permission hierarchy assigns which players may use each one.
Building blocks
Building blocks are included alongside the economy features for constructing shops and spaces.
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 1
Use cases
Economy in singleplayer
Players can use coins and a shop in a singleplayer world, with server-style mechanics but no server.
Essential multiplayer sessions
A group hosting an Essential session can share the same money system and shop.
Who it’s for: Server owners who want a money system and a shop on a Fabric server, and players who want server-style economy in singleplayer or Essential sessions.
How it compares
Yo's Coins is a Fabric mod for 1.20.1 that needs both client and server, released under CC0 1.0 Universal and not open source. Big Time Currency targets 1.20.1 – 1.20.6 with the same client and server requirement, under the MIT License and open source. Error-Server is server-side only, so players join without installing it, and it is released under the MIT License without being open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Error-Server | Fabric | 1.20.1 | Server-side only | 2026-06-08 |
| Yo's Coins | Fabric | 1.20.1 | Client and server | 2025-12-14 |
| Big Time Currency | Fabric | 1.20.1 – 1.20.6 | Client and server | 2024-12-12 |
Questions
Does Error-Server need Fabric API?
Do players need to install Error-Server?
Which Minecraft version does Error-Server support?
In the catalog
Error-Server is one of 2,072 Economy mods on ModsFinder, and one of 1,159 Economy mods for Fabric. 34,764 mods support Minecraft 1.20.1.
Similar mods
What the author says
⚠️ This mod is currently in active development. (Polish Version) # Error Server Bring multiplayer server mechanics into your singleplayer world or Essential multiplayer sessions.
Official listing
- Modrinth page
- modrinth.com/mod/error-server
- Owner
- Error39k9k
- Published
- 2026-06-08
- Updated on Modrinth
- 2026-06-08
- Facts verified
- 2026-10-15