What Curios API works with.
| Platform | Java Edition |
|---|---|
| Loaders | Fabric, Forge, NeoForge |
| Minecraft versions | 1.16.5, 1.18.2, 1.19.2, 1.20.1, 1.21.1, 26.1, 26.2 |
| Environment | Client, Server |
Curios API is a Minecraft Java library mod from TheIllusiveC4 (Illusive Soulworks). It gives other mods a shared way to add wearable accessory slots, rings, belts, necklaces, or anything else a mod wants, beyond vanilla's armor and hand slots. On its own it adds nothing to play beyond two example items and an inventory GUI (default keybind g). It's plumbing that other mods build their trinkets on top of.
What curios slots do in Minecraft
Curios doesn't ship any slots itself. A dependent mod registers a slot type through Curios' identifier registry, a ring slot, a belt slot, a necklace slot, and Curios exposes it in one inventory screen alongside the vanilla armor and offhand slots. Players can reorder, hide, or resize any slot a mod adds, and Curios enforces vanilla mechanics like mending and curse effects on whatever sits in them. Without at least one dependent mod installed, opening the Curios GUI just shows an empty screen. The value only shows up once something like Artifacts is registering slots and items into it.
Installing curios api
- 1.Confirm which mod loader you're running: Fabric, Forge, or NeoForge.
- 2.Download the build that matches your loader and Minecraft version from Curios' Modrinth page.
- 3.Drop the .jar into your mods folder alongside your loader's own files.
- 4.If you're playing multiplayer, install the same build and version on the server too. Curios runs on both sides, and a mismatch desyncs slots.
- 5.Install an accessory mod that actually adds items, such as Artifacts, so the new slots have something to fill them.
Loader and version support
NeoForge is the actively maintained line. The newest build, 16.0.0+26.2, published July 2026, targets Minecraft 26.2. Forge trails behind: its last build, 5.14.1+1.20.1, shipped April 2025, and nothing has followed it since NeoForge took over as this project's practical successor. Fabric is further behind still, a single Modrinth release, 0.0.13, built for 1.16.5 back in February 2023. Treat Fabric support as frozen rather than current.
See curios api in action
Curios API (Forge) mod overview and install walkthrough
Questions about Curios API.
5 questions
Does Curios API work with Fabric?
Barely, and not currently. Curios has shipped exactly one Fabric build on Modrinth, version 0.0.13 for Minecraft 1.16.5, published in February 2023. Forge and NeoForge get the regular updates instead, with NeoForge as the actively maintained loader today. A modern Fabric pack that wants accessory slots needs a different library.
What does Curios API let players do?
Nothing by itself. Curios only supplies the plumbing, an inventory GUI and a slot registry, that other mods use to add wearable accessories like rings, belts, and trinkets. Install a dependent mod such as Artifacts alongside it to actually get new slots and items in-game.
Does Artifacts need Curios API?
Not as a hard requirement. Curios shows up as an optional dependency on Artifacts' NeoForge build only; the Fabric and Forge builds of Artifacts don't list it, and Artifacts' own project description makes no mention of Curios integration. Running both together is fine, but Artifacts works without Curios installed.
Is Curios API safe to run on a multiplayer server?
Yes, it's built to run on both sides. Curios lists client and server as required, so install the matching build and version on the server as well as every client, or slots between them can desync.
Which Minecraft version does Curios API support?
It depends on the loader. NeoForge currently reaches 26.2 (July 2026), Forge stopped at 1.20.1 (April 2025), and Fabric is frozen at 1.16.5 (February 2023). Check the loader before downloading a build for your setup.
