CurseForge · Minecraft mod
RegionAPI
library that dynamically partitions Minecraft worlds into procedural regions, territories, and biome zones.
Quick answer
Which RegionAPI release should I use?
RegionAPI regionalapi-fabric-1.0.6.jar targets 1.21.1 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is RegionAPI required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does RegionAPI regionalapi-fabric-1.0.6.jar need?
regionalapi-fabric-1.0.6.jar. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add RegionAPI without breaking your instance.
Built for RegionAPI regionalapi-fabric-1.0.6.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use regionalapi-fabric-1.0.6.jar. It targets 1.21.1 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside regionalapi-fabric-1.0.6.jar. It opens that exact file at the source.
About this project
What does RegionAPI add?
RegionalAPI is an architectural framework and core territory engine designed to partition Minecraft worlds into distinct geopolitical and ecological regions.
⚠️ Important Note:
This mod is an engine / architectural framework. Out of the box, it provides the underlying territory systems, mathematical partitioning, and discovery tools, but does not include pre-made kingdom or fantasy regions. Developers, modpack creators, or addon mods must register their own custom region definitions, names, weights, and biome overrides using this API.
Example Use :


What RegionalAPI Provides for Your Regions:
- Dynamic Territory Architecture: Handles all the math and world partitioning, seamlessly organizing the map into recurring or rare unique territories.
- Built-In Regional Biome Overrides: Allows your custom regions to dynamically replace or override vanilla biomes and climates within their boundaries.
- In-Game
/locate regionCommand: Once your custom regions are registered, players can discover them using the vanilla-style/locate region <name>command with clickable coordinates and distance tracking. - F3 Debug Screen Integration: Automatically displays the active territory name on the F3 screen right above
Biome:.
Project description from CurseForge.
Pick your setup
RegionAPI by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
RegionAPI versions and loaders
regionalapi-fabric-1.0.6.jar
1 Nov 2026
regionalapi-forge-1.0.6.jar
1 Nov 2026
regionalapi-neoforge-1.0.6.jar
1 Nov 2026
regionalapi-neoforge-1.0.2.jar
31 Oct 2026
regionalapi-fabric-1.0.2.jar
31 Oct 2026
regionalapi-neoforge-1.0.0.jar
31 Oct 2026
regionalapi-fabric-1.0.0.jar
30 Oct 2026
Looking for an older file? The official CurseForge project page is in Resources.