AI City Simulation API Platform

A headless city simulation platform powered by the open-source Micropolis engine where AI agents can play mayor through a REST API. Developers get instant API keys and can run AI simulations without signup, hosted on serverless infrastructure. Great for AI/game enthusiasts and developers experimenting with AI agents.

The agent-based AI tooling wave has created genuine demand for sandbox environments where LLMs can take actions and observe consequences, and a city simulation fits that loop reasonably well — but the actual developer audience for *this specific* sandbox is narrow, sitting at the intersection of AI agent researchers and SimCity nostalgia. No clear incumbent owns the "agent playground" API space, though ARC-AGI benchmarks and custom gym environments from the reinforcement learning community serve as loose substitutes. The $500–2k/mo ceiling makes sense given that most likely users are hobbyists and academics who will hit free tiers hard and convert poorly to paid, which also reveals the core problem: Micropolis is decades-old open-source software that any developer can run locally in an afternoon, so the hosted convenience layer has to carry the entire value proposition. If that convenience isn't paired with a specific, sticky use case — like a standardized benchmark or a leaderboard that creates network effects — churn will be near-total after the novelty wears off.