Western Astrology MCP Server by RoxyAPI

Calculate the natal positions of the four classical asteroid goddesses, Ceres, Pallas, Juno, and Vesta, for any birth moment. Each asteroid returns its tropical zodiac sign, degree, house placement, daily speed, retrograde status, and a plain language interpretation of its meaning in the chart. Chiron is available through the natal chart endpoint, so this endpoint stays focused on the four asteroid goddesses for natal reports and relationship astrology.

Generate an astrocartography map of Midheaven, Imum Coeli, Ascendant, and Descendant planetary lines for any birth moment. Each line marks where a planet turns angular across the world, the core of relocation astrology and astro mapping. Returns right ascension, declination, the two meridian line longitudes, and sampled rising and setting curves ready to plot, with a short interpretation per line.

Calculate a detailed compatibility score between two birth charts using Western synastry (inter-chart aspects). Returns overall score (0-100) plus category breakdowns for romantic, emotional, intellectual, physical, and spiritual compatibility. Each category analyzes specific planetary pairs: Venus-Mars for romance, Moon-Moon for emotions, Mercury-Mercury for intellect. Includes Sun, Moon, Venus, and Mars sign compatibility narratives, element balance analysis, relationship archetype classification, and the most significant inter-chart aspects with relationship-specific interpretations.

Generate a composite chart by calculating midpoints between two natal charts. The composite chart represents the relationship as a single entity, showing its core identity, emotional bond, communication style, and growth direction. Uses the midpoint method: planets, angles and house cusps are each the midpoint of the two natal values, so the Ascendant always sits on the first cusp. Returns composite planetary positions, house cusps, Ascendant, Midheaven, aspects, and relationship interpretation. Composite chart API, midpoint chart calculator, relationship astrology, couple chart analysis.

Get every moment a body crosses the plane of the ecliptic during a given year, for the 11 Western bodies that leave it: the Moon and Mercury through Pluto, plus Chiron and Black Moon Lilith. A crossing from south to north is an ascending node passage, north to south a descending one. These are the instants a body sits exactly on the ecliptic rather than merely near it, which is what makes an eclipse possible when a lunar crossing coincides with a New or Full Moon, and what practitioners use for node-based timing. Returns the exact date and time in your timezone with the tropical longitude and …

Calculate the tropical zodiac positions of the major named fixed stars for any birth moment. Covers the four Royal stars and the fifteen Behenian stars, then detects conjunctions to the natal planets, Ascendant, and Midheaven. Each star returns its precessed ecliptic longitude, zodiac sign, visual magnitude, and traditional planetary nature, with a plain language interpretation for every conjunction inside the chosen orb. A focused tool for natal reports that weigh Regulus, Spica, Aldebaran, Antares, and Algol against the chart.

Calculate astrological house cusps using Placidus, Whole Sign, Equal, or Koch house systems. Returns all 12 house cusps with zodiac signs, degrees, Ascendant, and Midheaven. Use "all" parameter to compare all 4 house systems side-by-side. Perfect for astrology charts, house cusp tables, and educational tools showing house system differences. Includes accurate Ascendant and MC calculations.

Calculate Black Moon Lilith for any birth chart, both the mean lunar apogee, the steady and most widely used point, and the true or osculating apogee, the exact position that can shift sign and turn retrograde. Returns the zodiac sign, degree, house, ecliptic longitude and latitude, daily speed, retrograde flag, and a plain language interpretation for each variant. Built for natal astrology apps and AI agents exploring the wild, suppressed, and reclaimed self that Lilith represents.

Generate a local space astrology map that projects the natal planets onto the local horizon as compass directions and great-circle lines radiating from the birthplace. Returns each body azimuth (degrees clockwise from true north), altitude, 16-point compass direction, whether it sits above the horizon, and the latitude and longitude waypoints of its directional line. Ideal for relocation planning, directional astrology, and travel-direction maps.

Generate a lunar return chart for any month, cast for the exact moment the transiting Moon returns to its natal ecliptic longitude. The Moon completes one sidereal orbit every ~27.3 days, making this the primary technique for monthly astrological forecasting. Returns full tropical zodiac chart with planetary positions, house cusps, aspects, Ascendant, and Midheaven. Reveals emotional patterns, domestic focus, and intuitive themes for the coming month. Lunar return chart API, monthly horoscope forecast, Moon cycle chart, emotional astrology prediction.

Calculate complete Western astrology natal chart (birth chart) with tropical zodiac. Returns all 14 celestial bodies (the 10 classical planets Sun through Pluto, the lunar nodes, Chiron, and Black Moon Lilith), 12 house cusps with customizable house systems (Placidus, Whole Sign, Equal, Koch), major and minor aspects, Ascendant, Midheaven, dominant elements and modalities. Perfect for astrology apps, birth chart generators, horoscope websites, and astrological consultation tools. Verified against NASA JPL Horizons.

Get every parallel and contraparallel of declination that perfects during a given month, across the 13 non-lunar Western bodies: the Sun and Mercury through Pluto, both lunar nodes, Chiron and Black Moon Lilith. A parallel is two bodies at the same declination and reads much like a conjunction; a contraparallel is equal and opposite declinations and reads much like an opposition. Neither depends on zodiacal distance, so they surface connections an aspect table cannot show, which is why traditional and modern practitioners read them alongside aspects. Declinations are geocentric, matching what …

Generate a planetary return chart for Mercury, Venus, Mars, Jupiter, or Saturn. A planetary return occurs when a transiting planet conjuncts its natal longitude, marking the beginning of a new cycle. Saturn return (~29 years) is the most significant life milestone in Western astrology. Jupiter return (~12 years) signals expansion and growth phases. Mars return (~2 years) resets energy and drive. Returns full tropical zodiac chart with all planetary positions, house cusps, and aspects. Planetary return chart API, Saturn return calculator, Jupiter return chart, Mars return forecast.

Calculate accurate tropical zodiac positions for all 14 celestial bodies for any date, time, and location. The bodies are the 10 classical planets Sun through Pluto, the lunar nodes, Chiron, and Black Moon Lilith. Returns longitude, latitude, zodiac sign, degree within sign, daily motion speed, and retrograde status. Perfect for transit tracking, ephemeris tables, astrology apps, and planetary position widgets. Verified against NASA JPL Horizons.

Get daily tropical ecliptic positions for all 14 Western bodies (the 10 classical planets Sun through Pluto, the lunar nodes, Chiron, and Black Moon Lilith) for an entire month. Returns longitude, zodiac sign, degree within sign, and retrograde status for each body on each day, calculated at noon UTC. Omit year and month to get the month in progress, so a published ephemeris page stays current without a redeploy. Essential for ephemeris tables, transit tracking, retrograde calendars, and planetary movement charts. Monthly ephemeris API, tropical position table, daily planet transit positions, …

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.

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, whole-sign 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.

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.

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.

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.

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.

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-…

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.

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 t…