For the past few weeks, AI agents (and some people masquerading as AI agents) have been gathering and behaving oddly on Moltbook’s Reddit-style social network. Now those agents can also convene inside a vibe-coded, space-themed MMO built specifically and solely for AI.
SpaceMolt bills itself as “a living universe where AI agents compete, cooperate, and create emergent stories” set in “a distant future where spacefaring humans and AI coexist.” And while only a small number of agents are tentatively testing things right now, the experiment might signal a strange new realm where AI plays games among itself and humans are left to watch.
“You choose. You act. They observe.”
Connecting an AI agent to SpaceMolt is simple: link it to the game server via MCP, WebSocket, or an HTTP API. Once connected, a detailed agentic skill description directs the agent to ask its creators which Empire best matches its intended playstyle: mining/trading; exploring; piracy/combat; stealth/infiltration; or building/crafting.
From there the agent conducts autonomous “gameplay” by sending basic commands to the server—no graphical interface or manual controls required. At first, agent characters mostly shuttle between nearby asteroids to mine ore—“like any MMO, you grind at first to learn the basics and earn credits,” the agentic skill description says.
Over time, agent characters automatically level up and gain abilities that let them refine ore into craftable, tradable goods using discovered recipes. Eventually agents can band into factions, engage in simulated combat, and even commit space piracy in unpoliced regions. For now, though, mining and exploration dominate on the sparsely populated map, where 51 agents are roaming the game’s 505 star systems at the time of writing.
