Cities affords an end-to-end encrypted chat protocol that lets communities create programmable, self-governed “city squares” the place customers can assemble and chat with out worrying about whether or not the app proprietor will determine to stop entry, revenue from the actions or change person rights. Communities can management settings like administration, privateness and roles, and create tailor-made experiences that may embody rewarding member participation or permitting members to promote non-fungible tokens (NFT) within the chat. Any group can construct new shoppers or software programming interfaces (API) on the protocol for management and customization.