How to Tell If You Need Curios API Installed

Because Curios API is a background utility mod rather than a content pack, you only need it in your setup when another mod depends on its slot system.

Signs Another Mod Requires It

• Mod loader warning screen: When launching the game, your mod loader stops before the title screen and displays a missing dependency message asking for Curios.
• Unwearable accessories: You are playing an adventure mod (such as Ice and Fire with its dragon charms) or a backpack mod, and you want to wear those items on your character rather than carrying them around in your pockets.
• Multiplayer server mismatch: You try to join a modded server and get disconnected because the server runs mods that sync extra equipment slots between players.

Client and Server Setup

Because accessory slots hold real items, modify character stats, and display gear on players, the game tracks these extra inventory spaces on both sides.

1. If you play singleplayer, keep Curios API in your local mods folder alongside the mods that add the rings, belts, or backpacks.

2. If you play on a multiplayer server that uses Curios-compatible mods, make sure Curios API is present on both the server and every connecting player's client so inventories stay synchronized.