NatalChart.AI Astrology

ai.natalchart/astrology · v1.0.0

Swiss Ephemeris astrology: natal charts, transits, synastry, solar returns and astrocartography.

MCPremoteAPI keyTransportTravel

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Last check

Reachable, 10 tools, protocol 2025-06-18 · checked 2026-10-17

Test & rating

B 80/100

What it does: 10 tools · 10 read, 0 write · Travel

Test call daily_transits: needs a key: tool error: missing_api_key: Send your key as 'Authorization: Bearer <key>'. Keys are free: create one at https://www.natalchart.ai/ (1,003 ms)

How the rating is made

Answers without login: +30
Speed of first answer: +10
Lists tools: +10
Tool descriptions: +15
Parameter descriptions: +2
Read/write annotations: +5
Safe test call: +8
More than 80 tools: 0

Tested 2026-10-17. Fixed rules, no AI model. Grade A needs a successful real call.

Install

Remote URL

https://www.natalchart.ai/mcp

Tools

10 tools listed at last check

natal_chart A natal chart from birth data. "part" picks what to return: full (everything: bodies with sign, degree, speed, retrograde flag and house; the angles; twelve Placidus cusps; aspects with orbs; element and quality balance; fixed-star contacts), short (Sun, Moon and Ascendant, each body's sign, retrogr
daily_transits The calculated day: the sky at noon UTC, the Moon's phase, the sky events of the coming week and, with birth data, every transit to the natal chart with its orb. No generated text. Use it for a day's horoscope or what is happening for someone now: send birth for a personal answer, leave it out for t
sky Planetary positions, Moon phase and the coming week's sky events for a date (?date=YYYY-MM-DD, today by default). Use it for where the planets are on a date, the Moon phase, or the coming retrogrades and ingresses, when no one's chart is involved.
usage Your plan, today's count and when the pool refills. Costs nothing. Use it when a call fails on the limit, or before a long series of calls, to see the plan and what is left today.
transits Up to 60 transit events in a window of up to 92 days, the most significant kept when there are more: exact transit-to-natal aspects by date, sign ingresses and stations. (API Pro) Use it for forecasts over weeks or months (a year is four windows); for a single day use daily_transits.
synastry Two charts compared: inter-chart aspects with orbs, house overlays both ways and a score per life sphere. (API Pro) Use it when the user asks about compatibility or a relationship and gives birth data for both people.
solar_return The solar return chart for a year, cast for the birth place or another location. (API Pro) Use it for the year ahead from a birthday; it needs a birth time.
best_days Every day of a window of up to 62 days scored for one activity (general, business, romance, health, creative, travel, home, clarity): helping and hindering transits, Moon phase and sign, void of course. The five best days first. (API Pro) Use it to pick dates for an activity within the next weeks.
location_score One place against one chart: the relocated angles, the planets on them with orbs, a score for each life sphere and an overall score. (API Pro) Use it when the user asks whether a specific city or place suits them; it needs a birth time and the place's coordinates.
best_cities The catalogue of major cities ranked for one chart, overall or by chosen life spheres, worldwide or in one region. (API Pro) Use it when the user asks where in the world to live, work or travel; it ranks major cities, optionally by life sphere or region.

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