openephemeris-MCP

Your personal astrologer, powered by NASA JPL DE440 ephemeris data. Natal charts, transits, synastry, eclipses, moon phases, electional timing, Human Design, and chart wheel visualization — all interpreted conversationally.

Generate and interpret astrocartography (ACG / locational astrology) — planetary lines, parans, crossings, local space, and how moving to a different location changes a chart. Use when someone asks about astrocartography, ACG, the best place to live, what city is best for their career or love life, relocation, or planetary lines.

Calculate and interpret Chinese BaZi Four Pillars / Chinese zodiac and Vedic Jyotish charts including nakshatras, dashas, yogas, and ayanamsa selection. Use when someone asks about Eastern astrology systems, their Chinese zodiac animal, BaZi, sidereal/Vedic chart, nakshatra, or dasha.

Analyze relationship compatibility between two people using synastry, composite, and Davison/midpoint charts. Use when someone asks about romantic compatibility, relationship dynamics, friendship chemistry, business partnership fit, or how two people's charts interact.

Calculate and interpret Human Design maturation transits — Saturn Return, Uranus Opposition, Chiron Return, Jupiter Return, and Uranus Return. Use when someone asks about their HD life cycles, maturation points, midlife crisis transits, or the major developmental milestones of the Human Design system.

Generate and interpret Human Design bodygraph charts including type, strategy, authority, profile, incarnation cross, defined and undefined centers, gates, and channels. Use when someone asks about their Human Design, HD type, strategy and authority, or any Human Design concept.

Interpret a natal (birth) chart using OpenEphemeris. Use when someone asks about their birth chart, planetary placements, personality traits, life themes, the Big Three (Sun/Moon/Rising), houses, aspects, dignities, nodes, Chiron, or any astrological analysis based on birth data.

Complete endpoint reference for the 121 OpenEphemeris API endpoints. Use when you need to find the exact endpoint, parameter, or path for an astronomical or astrological computation, or when other skills haven't covered the calculation a user is asking for.

Install and configure the OpenEphemeris MCP server. Use when a user wants to set up OpenEphemeris, get an API key, troubleshoot installation, or connect Claude / Cursor / Windsurf / ChatGPT to the planetary calculation API.

Find optimal timing for activities, analyze current transits, identify the best moment for an event, or describe the current astrological weather. Use when someone asks "when should I…?", "what transits are happening?", "what's the moon doing?", or anything about election, electional astrology, eclipses, retrogrades, or moon phases.