EUREKA has brought together 21 multi-actors (MA) from 16 member states and 48 supporting organizations, to co-create a stronger and reinforced EU wide agricultural knowledge base by developing an open source e-platform, called the FarmBook. This two-sided market platform, like Facebook, will address the needs and improve the connections between two distinct user groups: MA project partners and MA end users (farmers, foresters, advisors, scientists, policy makers,…). To realize this, EUREKA will first analyze the MA project knowledge supply (outputs, activities, dissemination,…) to get a comprehensive data overview and distinguish do’s and don’ts on how to co-create and transfer knowledge in these projects. From this analysis best practices and recommendations will be formulated into a MA bible for the current MA community and for EIP-AGRI (+ SWG SCAR AKIS) to improve the design of future MA projects. Participatory activities with many MA projects during EUREKA will lay the foundation to build a more engaged MA project community. All available resources that can be used to share amongst the community and to shape and promote the EUREKA outputs will also be mapped. Second, EUREKA will analyze the knowledge demand from potential end users by profiling them and determining their needs, barriers and preferences across four macro-regions in Europe and across the different agricultural sectors. Third, EUREKA will integrate the results of the analysis on the knowledge supply & demand by consulting various expert working groups to co-create a ranking of MA projects and to select the most relevant and high impact agricultural MA project knowledge for the rural and scientific community. Fourth, the FarmBook will be built to present this knowledge in an accessible, standards-based, easily searchable and open source way. Fifth, the FarmBook will be optimized in several iterations with end-user feedback and will be promoted to end users and the MA project community across Europe.