CityCoins is designed to enable a community of stakeholders to support and build their favorite cities in a permissionless environment. You can also think of CityCoins as the cornerstone protocol of the open source city stack. Since CityCoins are programmable, they can be used as fuel to build applications specific to each city.

CityCoins provides a way for people to support their city and grow its cryptocurrency pool while earning themselves Bitcoin BTC and Stacks STX earnings. Each city has its own coin, the first CityCoin to be launched is MiamiCoin (MIA).
MiamiCoin is a cryptocurrency supported by the Stacks Protocol, which enables smart contracts on Bitcoin.