The MK Data Hub is award winning technical, data infrastructure of the MK:Smart project, supporting the collection, integration and use of large amounts of data from many diverse resources relevant to city systems. The datasets include local and national open data, data streams from both key infrastructure networks (energy, transport, water) and other relevant sensor networks (e.g. weather and pollution data), data crowdsourced from social media and mobile applications, etc. As a data platform for the city, the MK Data Hub enables the onboarding of data from data providers, who remain in control of the redistribution policies (the data licences) and the access permissions they want to apply. The data catalogue supports the discovery of the data, as well as the description and traceability of the relevant metadata, such as the sources and rights that apply to the data.