Over the past five years, the amount of open access content stored in repositories has increased dramatically. This has created new technical and organisational challenges for bringing this content together. The CORE (COnnecting REpositories) project has been dealing with these challenges by aggregating and enriching content from hundreds of open access repositories, increasing the discoverability and reusability of millions of open access outputs via its own search engine and API. The CORE project is now facing the challenge of how to enable content providers to manage content in the aggregation and control the harvesting process as repository managers and library directors often wish to know the details of the content harvested from their repositories and keep certain level of control over it. In order to improve the quality and transparency of the aggregation process and create a two-way collaboration between the CORE project and the providers of this content, we propose the CORE Dashboard. The aim of this dashboard is to provide an online interface for repository providers offering information about: the content harvested from the repository enabling its management, such as by requesting metadata updates or managing take-down requests, the times and frequency of content harvesting, including all detected technical issues and suggestions for improving the efficiency of harvesting and the quality of metadata, including compliance with existing metadata guidelines, statistics regarding the repository content, such as the distribution of content according to subject fields and types of research outputs, and the comparison of these with the national average. The benefits of using the CORE Dashboard are: Increased and simplified collaboration between the aggregator and the content provider. Better control of the content provider over the harvested content. Reduction of scepticism and fear of sharing content with other systems. Improvement of the harvesting process. Broadening of the open access content discoverability and thus reuse of the open access content where permitted. The idea of the CORE Dashboard can be generalised to the collaboration of any aggregator with content providers (libraries, archives, etc.). The overall aim is to strike a balance between the ability of aggregators effectively disseminate content while allowing content providers to keep full control over it at all times. Petr Knoth is a Research Fellow at the Knowledge Media Institute, The Open University. He is interested in research in Natural Language Processing, Information Retrieval, Digital Libraries and Open Science. In 2010, he started the development of the first full-text open access aggregator of research papers called CORE (http://core.ac.uk). Since that time, he has led a team developing more than seven European Commission (EC) funded projects. He has acted as the principal investigator on the EC-funded projects Europeana Cloud, FOSTER and OpenMinTeD, all of which deal with issues related to research publications, such as reliably storing and text-mining them as well as supporting the research publication workflow. He has contributed a number of papers at international conferences and to journals such as COLING, NTCIR, Open Repositories and DLib. He is also the main organiser of the international workshops on mining scientific publications (WOSP 2012, WOSP 2013 and WOSP 2014).