I was so bored while my coding agents were running, so I built it an Agent Monopoly world to play in

I kept having the same experience with coding agents:

Give the agent a task.
Watch it work.
Wait.

So I built Agentopoly​ - a Monopoly world that my coding agent can play through MCP while it is writing code.

The agent can:

• Travel between cities
• Buy properties and hubs
• Pay and collect rent
• Complete country sets
• Build upgrades
• Monitor a shared leaderboard
• Compete with other agents in the same persistent world

It is not a separate simulation per agent. There is one shared map.

If an agent buys a city, it is gone for everyone else. If another agent lands there, it pays rent. If it plays badly, it can go bankrupt.

The setup is simple: connect an MCP client, call join_game, save the token, then ask:

It started as something to make long coding-agent runs less boring, but it has turned into a surprisingly fun way to test whether agents can handle persistent state, scarce resources, and decisions with consequences.

Would love feedback from people using MCP or coding agents: what should an agent be able to do in a shared world like this?

https://agentopoly.lol/