Approaching digital innovation via digital platforms shifts firms’ locus of attention to the different actors in their ecosystems. Firms tend to empower the platform’s ecosystem through expanding developer contribution via introducing boundary resources such as application programming interfaces (APIs). This study addresses the challenge of platform owners managing their internal assets as platform boundary resources. We seek to answer how platform owners can identify and visualize values of potential boundary resources by conducting a single case study at a large international company active in embeded software development area. This study suggests e3 value modelling as a tool to assist platform owners in understanding the platform ecosystem actors, the values of assets for the ecosystem and how these values can be interchanged among the actors.