Monopoly AI Simulator

API keys

Keys stay in this browser (localStorage) and are sent only to the provider you pick. Calls go straight from your browser to each API, so a provider that blocks browser requests (CORS) will show an error here and that player falls back to the rule-based bot. OpenRouter or a local proxy are the easy workarounds.

Game settings

Edition

Starting cash Round limit (optional) Games to run Games in parallel Seed (optional)

Auction declined properties Auction assets of players bankrupted by the bank Random seating order each game Free Parking jackpot (house rule)

Every player gets a say before every roll, decides their own liquidations, can propose as many trades as they like, negotiates with counter-offers, and can talk to the table publicly or whisper to one opponent. Games run until one player is left unless you set a round limit.

Advanced

Parallel calls per provider Call timeout (s) Store full prompts and replies in the log

Players

Universal strategy instructions

Given to every player, in addition to each player's own instructions.

Import settings

No simulation running.

Watch

Saved games

Every game is stored in this browser with its complete event log and every model call (prompt, reply, latency, tokens). Export to keep it elsewhere.

Analytics

Batch