MCAI

MCAI works as an intermediary between Minecraft and Character AI. A player links an account by copying an authorization token from the Character AI website into the mod configuration file, or by running the ai authorize command in-game, which updates that file automatically. Once authorized, the player registers an AI chat with the ai register command or by editing the configuration file directly.

Each registered character is identified by a character ID, taken from the character URL on Character AI, and can be given optional aliases. Aliases are a space-separated list of alternative names used to ping the AI in chat, much like nicknames. The character ID lets the mod fetch basic information about the character, such as its name, so the player knows which character receives the messages.

MCAI is built for players who want company in a large, empty world. It is a server-side only mod, so only the server needs it, and players join without installing anything. It needs Cloth Config API and Fabric API, and is published for Fabric across 17 release versions, 1.20 – 1.21.10, under the MIT License, which makes it open source.