Metax is the metadata repository for all research datasets and additional metadata stored in the Fairdata.fi services. Additional metadata can be added manually with an compatible metadata editor like Qvain or harvested from other sources. In the near future also API use will be possible. The aim is to collect as much information as possible about Finnish research data. Metax will provide this information further to the national Research Information Hub. Metax also offers reference datasets for the research sector.