What is Curios API?
Curios API by TheIllusiveC4 is the equipment-slot framework Forge and NeoForge mods use for wearable accessories: rings, necklaces, belts, charms, backpacks, and curio-specific gear all equip into dedicated slots beside your armor. Players see it as the extra grid on the inventory screen (the Curios button or keybind opens it).
Dozens of mods depend on it — Artifacts' trinkets, Sophisticated Backpacks' back slot, magic mods' amulets — making it one of the most-installed library mods that players actually interact with daily. Fabric's equivalent role is filled by the Trinkets mod.
What Players Should Know
- Open the Curios screen via the button on your inventory (or its keybind) to see available slot types: ring, necklace, belt, head, back, charm, hands, and any custom types mods add.
- Slot counts are data-driven: packs grant or restrict slots, and some progression systems award extra ring or charm capacity over time.
- Effects apply while equipped, exactly like armor; tooltips state a curio's valid slots.
- Keep an eye on set interactions: accessory mods (Artifacts, Relics, magic baubles) balance around slot scarcity, so slot-expansion items and quests are worth chasing in packs that gate them.
For modpack makers, Curios exposes commands and datapack hooks to tune every slot type without code.
Curios API FAQ
Why do I have no Curios slots for my ring?
The pack controls slot availability. If a slot type is missing, the pack either gates it behind progression or no installed mod grants it; check quest rewards and the pack notes.
Is Curios the same as Trinkets?
The concept is the same on both loaders: Curios serves Forge and NeoForge while Trinkets serves Fabric. Mods pick the API matching their loader; some support both.