Western Astrology MCP Server by RoxyAPI

Calculate the annual profection and lord of the year for any birth chart and target date using the Hellenistic time lord technique. Each completed year of life advances the rising sign by one whole sign house, activating a new profected house, profected sign, and ruling planet that sets the tone of the year. Returns the age, profected house and sign, the lord of the year with its natal sign and house placement, and a plain language interpretation for traditional and Hellenistic astrology apps.

{"date":"1990-07-15","latitude":40.7128,"longitude":-74.006,"targetDate":"2025-08-04","time":"14:30:00","timezone":"America/New_York"}

Generate the secondary progressed chart for any date using the day-for-a-year key. Each day of ephemeris motion after birth stands in for one year of life. Returns every progressed body with its sign, degree, natal house, motion, and retrograde state, plus the progressed Ascendant and Midheaven via the Naibod arc. The progressed Sun and progressed Moon are the headline timing markers for inner growth and emotional chapters. Secondary progressions API, progressed chart calculator, progressed Sun and Moon, progressed Ascendant and Midheaven.

{"date":"1990-07-15","latitude":40.7128,"longitude":-74.006,"targetDate":"2025-07-15","time":"14:30:00","timezone":"America/New_York"}

Calculate a relocation chart (relocated birth chart) for a new place on Earth. The birth moment stays the same, so every planet keeps its natal sign and degree, while the Ascendant, Midheaven, Vertex, and all twelve house cusps are recomputed for the new latitude and longitude. Returns the relocated houses and angles, the planets that change house, the angular planets activated at the new place, and the distance and compass direction from the birthplace. Built for relocation astrology readings, astrocartography style move planning, and travel charts. Verified against NASA JPL Horizons.

{"birthLatitude":21.3069,"birthLongitude":-157.8583,"date":"1961-08-04","relocationLatitude":40.7167,"relocationLongitude":-74.006,"time":"19:24:00","timezone":-10}

Calculate a solar arc directed chart for any birth moment and target date. The solar arc is the secondary-progressed Sun longitude minus the natal Sun longitude, about one degree for each year of life, and every natal point including the Ascendant and Midheaven is advanced forward by that same arc. Returns the solar arc, each directed point with its natal and directed longitude, zodiac sign, degree, and a plain language interpretation, for predictive astrology apps timing major life events. Built on accurate tropical chart positions, no astronomy expertise needed.

{"date":"1990-07-15","latitude":40.7128,"longitude":-74.006,"targetDate":"2025-07-15","time":"14:30:00","timezone":"America/New_York"}

Generate a solar return chart for any year, the foundational technique for annual astrological forecasting. The chart is cast for the exact moment the transiting Sun returns to its natal ecliptic longitude (your astrological birthday). Returns full tropical zodiac chart with planetary positions, house cusps, aspects, Ascendant, and Midheaven. Location-sensitive: relocating your solar return chart to a different city changes the houses and Ascendant. Solar return chart API, annual horoscope forecast, birthday chart calculator, yearly astrology prediction, relocated solar return.

{"birthDate":"1990-07-15","birthTime":"14:30:00","latitude":40.7128,"longitude":-74.006,"returnYear":2026,"timezone":"America/New_York"}

Calculate complete synastry (relationship compatibility) between two natal charts using Western tropical astrology. Analyzes inter-chart aspects between all planets to determine romantic, friendship, and karmic compatibility. Returns compatibility score (0-100), detailed inter-aspects with strength ratings, harmonious vs challenging aspect counts, and relationship dynamics analysis. Perfect for dating apps, matrimonial sites, relationship counseling tools, and astrology compatibility features. Based on professional astrological techniques.

{"person1":{"date":"1990-07-15","latitude":40.7128,"longitude":-74.006,"time":"14:30:00","timezone":"America/New_York"},"person2":{"date":"1990-07-15","latitude":40.7128,"longitude":-74.006,"time":"14:30:00","timezone":"America/New_York"}}

Calculate all transit-to-natal aspects with detailed interpretations, strength ratings, and timing guidance. Compares current (or future) planetary positions against your natal chart to identify active transits. Returns aspect type, orb, applying/separating status, narrative interpretation, impact rating, and practical guidance for each transit. Like /astrology/transits with a natalChart, returns summary, timing, impact, guidance, and keywords for each aspect. Adds planet, aspect-type, and minStrength filtering plus summary.strongest and summary.byType rollups. Transit aspects API, transit-to-natal analysis, predictive astrology, personalized transit forecast.

{"natalChart":{"date":"1990-07-15","latitude":40.7128,"longitude":-74.006,"time":"14:30:00","timezone":"America/New_York"}}

Calculate current or future planetary transits (positions of all bodies now). Optionally compare transits to natal chart to find transit-to-natal aspects. Returns all 14 celestial bodies (the 10 classical planets, the lunar nodes, Chiron, and Black Moon Lilith) with signs, degrees, and speeds. When natal chart provided, includes transit aspects (transiting Sun conjunct natal Mars, etc.) with orbs and applying/separating status. Perfect for daily transit forecasts, aspect alerts, and personalized transit reports.

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Get every tropical sign change for a given month, for all 14 Western bodies: the Sun through Pluto, both lunar nodes, Chiron and Black Moon Lilith. Returns the starting sign of each body on the first of the month and then each ingress with its exact date and time in your timezone. Omit year and month to get the month in progress, so a published transit calendar stays current without a redeploy. Essential for transit calendars, monthly forecast copy, retrograde and ingress tracking, and newsletter automation. Monthly transit API, planetary ingress calendar, sign change dates, tropical transit table. Verified against NASA JPL Horizons, with the four cardinal ingresses cross-checked against published equinox and solstice times.

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