In our work where the functionality of the EWP Network is tested, it is necessary to start with defining APIs. API stands for Advanced Programming Interfaces, ie services (mentioned on GitHub) that can be used by network participants to exchange data.
A current list of APIs available under the EWP is available at https://developers.erasmuswithoutpaper.eu. To briefly mention how how it works here, EWP Network has a Development environment (DEV) and a Production Environment (PROD). It can be used to test environments, but a number of contracts must be signed.