Open Ephemeris

1 server

Open EphemerisOpen EphemerisSub-arcsecond astrology and astronomy from the NASA JPL DE440 ephemeris: natal charts, synastry, transits, moon phases, eclipses, Human Design, Vedic, BaZi and astrocartography as 92 typed tools, with interactive charts that render inline in Claude and ChatGPT. Local via npx @openephemeris/mcp-server or hosted at https://mcp.openephemeris.com/mcp (OAuth). Also a one-click app in the ChatGPT app directory.

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