Bielefeld University started to aggregate data from German universities and research organizations revealing costs per article for Open Access journal publishing. The participating institutions agreed to make their figures openly available via a GitHub under an Open Database License. Bielefeld University established a process to normalize data by using the CrossRef API and DOAJ. The goal of the Open APC initiative is to demonstrate how reporting on fee-based Open Access publishing can be made more transparent and reproducible across institutions. At the moment, the dataset releases information on 1.599 articles, with total expenditure of 1.938.505 EURO. Several interesting sample visualizations have already been published on that basis.
