celestine

You'd reach for this when you need astrological calculations in your Claude workflow without building ephemeris logic from scratch. It handles birth chart generation, transit calculations, progressions, and can generate astrological calendars. The implementation details are sparse, but it's clearly built for working with natal chart data and time based astrological events. If you're building horoscope tools, scheduling apps with astrological features, or any system that needs to compute planetary positions and aspects, this gives you those primitives over HTTP. Saves you from wrestling with astronomical algorithms and coordinate systems yourself.