Multiplayer is fully intergrated with the Aether II, The Aether team have a server known as the AOS dedicated to the Aether Multiplayer. This server can be found on the Aether II version of the main menu.
The social aspects of the Aether II play a key part in multiplayer as they allow parties and co-op dungeon raids. Party members can see each others stats including health, hunger, armor and Aether coins. Members in the same party cannot hurt each other.