The Big IoT project aims to bridge interoperability gaps in the Internet of Things (IoT) by facilitating the integration and development of cross-platform applications through a unified API marketplace. The project, which runs from January 2016 to December 2018, has an open call for third parties to implement IoT solutions, with a total budget of €750k across two calls. The first call focuses on smart mobility and environmental monitoring innovations, inviting SMEs, universities, and research institutions to participate.