
Modrinth · Minecraft mod
Factory API
An API that supports different mod loaders and is the basis of mods like Factocrafty
Quick answer
Which Factory API release matches 1.21 Forge?
Factory API 1.21.1-2.2.7+forge targets 1.21, 1.21.1 with Forge. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Factory API required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Factory API 1.21.1-2.2.7+forge need?
1.21.1-2.2.7+forge on 1.21 Forge. Every mod below is checked against that same setup.
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 Factory API without breaking your instance.
Built for Factory API 1.21.1-2.2.7+forge on 1.21 Forge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.21.1-2.2.7+forge. It targets 1.21, 1.21.1 with Forge; 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
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.21.1-2.2.7+forge. It opens that exact file at the source.
About this project
What does Factory API add?
🥽 About
An API that adds several client and server side functions, both for developers and those who make resource packs, among them:
- UI Definitions, to add or modify countless elements of the screens and GUI, either using resource packs (main function) or by code
- Essential Events, most of them abstracting directly from the mod loaders
- A Common Network, to send and register payloads in a unified way, requiring almost zero changes between the supported versions
- Several common implementations among modloaders of item, fluid and energy storage with the correct exposure for the respective APIs
- A way to have block lighting levels with access to Level (only implemented in Fabric, Forge and NeoForge already have this)
Project description from Modrinth.
Pick your setup
Factory API by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.11
3 loader builds1.21.10
4 loader builds1.21.8
4 loader builds1.21.5
4 loader builds1.21.4
4 loader builds1.21.3
4 loader builds1.21.2
3 loader builds1.21.1
4 loader builds1.21
4 loader builds1.20.4
4 loader builds1.20.3
4 loader buildsShowing the newest 12 of 14 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Factory API versions and loaders
1.21.1-2.2.7+forge
FactoryAPI-1.21.1-2.2.7-forge.jar
20 Nov 2025
1.21.1-2.2.6.2545.1+forge
FactoryAPI-1.21.1-2.2.6.2545.1-forge.jar
9 Nov 2025
Looking for an older file? The official Modrinth project page is in Resources.