The C4BI project is a Network of Procurers that will provide an integrated answer to the challenge of urban innovation by combining in the same network City Authorities and Innovation Organizations, thus allowing impacting both the demand and the supply.The C4BI project approach relies on the networking of urban public procurers that will enhance internal processes and foster transnational procurement processes with innovation facilitators that will mobilize SMEs for the procurement processes and innovation organisations that will facilitate the demand-supply link and mainstream and disseminate the results.• City Authorities: acting at the demand side, through directing their public procurement towards more innovative or more sustainable technologies. C4BI counts in its consortium with the city councils of all the districts where the service will be implemented (Espinho, Stoke-on-Trent, Castellón, and Lublin).• Innovation Partners: will act as facilitators by establishing the bridge between demand and supply, assisting public authorities in the definition of processes and setting up of specifications for public tendering.• Innovative solution providers: that will participate with innovative solutions and applications addressing the societal and urban challenges addressed in the Innovative Public Procurement processes fostered by the project.Through innovative procurement procedures and cross border co-operation, the C4BI project will contribute to economic development, innovation and competitiveness of Europe, strengthen the role of SMEs in the EU market and encourage the adoption of innovative public services.