The Joint Data Project (GDP) launched by a number of Swedish research funders was presented earlier this year at the Spring membership meeting in Leuven. The project has now released its APIs together with the accompanying documentation. Most of the information is in Swedish only, but the diagram in dbdiagram on the GitHub-page contains translations to English.
Please note: The Swedish Energy Agency has now (on Dec 2nd) published JSON-files with their GDP-compliant data on their website (Swedish language). The project team have also released an English version of the readme-file on the GitHub-page.