OpenAIRE-Nexus brings in Europe, EOSC and the world a set of services to implement and accelerate Open Science. To embed in researchers workflows, making it easier for them to accept and uptake Open Science practices of openness and FAIRness. To give the tools to libraries, research communities to make their content more visible and discoverable. To assist policy makers to better understand the environment and ramifications of Open Science into new incentives, scientific reward criteria, impact indicators, so as to increase research and innovation potential. To foster innovation, by providing SMEs with open data about scientific production. To this aim, OpenAIRE-Nexus onboards to the EOSC fourteen services, provided by public institutions, einfrastructures, and companies, structured in three portfolios: PUBLISH (catch all repository; Open Access overlay journal platform; data anonymization; Data Management Plans), MONITOR (Open Science and research impact monitoring; open citation indexes for article-article, article-dataset links; European monitoring of Article Processing Charges, publication usage statistics), and DISCOVER (open catalogue and APIs to the OpenAIRE Research Graph of interlinked publications, data, software, projects; discovery portals for communities; validation and brokering services for data sources to improve their metadata). The services are widely used in Europe and beyond and integrated in OpenAIRE-Nexus to assemble a uniform Open Science Scholarly Communication package for the EOSC. The project aims at forming synergies with other INFRAEOSC-07 awarded projects, the INFRAEOSC-03 project, research infrastructures, einfrastructures, and scholarly communication services define a common Open Science interoperability framework for the EOSC, to facilitate sharing, monitoring, and discovery of EOSC resources across disciplines.