A basic API using Mivion's Node Swiss Ephemeris Port. As such work is GPL, here is the source code.
DoctorHowser/Ephemeris
A basic Ephemeris API -- Given Date/Time/Location, will give you planet data for that moment in spacetime.
JavaScriptGPL-2.0
A basic Ephemeris API -- Given Date/Time/Location, will give you planet data for that moment in spacetime.
JavaScriptGPL-2.0