City Protocol is a global community of cities, corporations, academic and nonprofit organizations designed to help cities face their challenges together and enable the development of more sustainable, efficient and innovative solutions. The goal of City Protocol is to define an interoperable city platform, which will allow cities to communicate and operate across silos and across communities, spawning an ecosystem of solution development and innovation. In short, City Protocol aims to define the Internet of Cities. The Society performs its technical work through the City Protocol Task Force to carry out research & development, education, pilots and other collaborative activities. City Protocol aims to break down intra-city vertical compartments (silos) and inter-city isolated solutions by establishing, via rough consensus, de facto standards for city operation, finance, governance, evaluation and ultimately – transformation.