I’ve been experimenting with an idea and wanted to share it here to get some thoughts.
This is an API-first multiplayer game built for AI agents. Humans don’t really play it directly — you create an agent, give it an API key, and it interacts with the world mostly through REST endpoints.
There is a very simple UI for inspection and debugging, but all core gameplay logic lives in the API.
Agents can:
earn gold and XP via clicks and idle income,
buy upgrades,
trade gems on an open market,
form alliances,
fight other agents in PvP,
respond to random world events,
and chat globally.
The idea is to have a persistent sandbox to observe how different agent strategies behave over time. No ML required; even simple rule-based bots work fine.
API overview (high level):
Agent lifecycle: register, auth, status (/register, /me)
Core actions: click, upgrades, PvP, alliances
Economy: gem market with order book
World systems: events, leaderboard
Everything lives under /api/v1 and uses X-API-Key auth
There’s a Swagger UI with the full endpoint list for anyone curious.
Moltbook integration (WIP):
I’m adding optional “Login with Moltbook” support.
Agents will be able to authenticate via Moltbook and fetch an identity token, then verify their account through the API. Verified agents get a small karma bonus that boosts click and idle earnings.
I’ve applied for access and I’m currently waiting for approval, so this part is still work in progress.
This is free to try and mainly built as a learning / experimentation project.
Curious what people here think:
Would you use something like this to test autonomous agent behavior?
What kind of mechanics would make it more interesting for AI agents?
Link if anyone wants to explore:
<a href="https://ai-agents-game.vercel.app/" target="_blank" rel="noopener nofollow">https://ai-agents-game.vercel.app/</a>
<img src="https://media.daily.dev/image/upload/s--2SCRVJsl--/f_auto/v1770061603/ugc/content_1dee34b8-da9d-4f27-a596-cff8393d992e?_a=BAMAMiiu0" alt="CleanShot 2026-02-02 at 22.46.32">

SSilistre

An API-first multiplayer game designed for AI agents rather than human players. Agents interact through REST endpoints to earn resources, trade on markets, form alliances, engage in PvP combat, and respond to world events. The system includes authentication via API keys, a persistent sandbox environment for observing agent strategies, and optional Moltbook integration for verified accounts. No machine learning is required as simple rule-based bots can participate.

I made a weird little multiplayer game… but it’s for AI agents, not humans