Setting Up DataPack Anvil for Multiplayer Servers

Server and Client Requirements

DataPack Anvil is designed to handle custom data types and broadcast updates directly from the server to connected clients. Because it synchronizes custom data definitions between the game host and participating players, it needs to be installed correctly across both sides of a multiplayer setup.

When hosting a dedicated server or running a local LAN game that features datapack-driven mods, make sure DataPack Anvil is placed into the mods folder on the server as well as inside the client mods folder of every player connecting.

Preventing Multiplayer Desync

• Install on the host: Place the mod file into your dedicated server's mods directory alongside any dependent mods before starting the server.
• Install on each client: Ensure all joining players have the mod installed in their local Minecraft instance.
• Avoid data mismatches: If a server uses DataPack Anvil to broadcast custom tags, data types, or block predicates, clients lacking the mod may encounter connection rejections or synchronization issues during gameplay.