University of Calgary SRS HAPI (Heliophysics API) Server
The HAPI 3.3 interface of the UCalgary Space Remote Sensing API — /hapi, /about, /capabilities, /catalog, /info and /data — serving ground-based instrument time series (NORSTAR riometers and related arrays) in the community Heliophysics Data Application Programmer's Interface format. Verified live: /hapi/capabilities returns HAPI 3.3 with csv, binary and json output formats.