The ICOS Portal app is a FAIR linked data repository for metadata and data. In first instance primarily targeted at hosting the high quality data from ICOS. The repository is optimized for machine to machine communication. Instances in production now for ICOS, Swedish SITES and ICOS Cities networks.
A complete repository requires two separate services, meta and data.
Please also read https://github.com/ICOS-Carbon-Portal/data#information-for-developers