NatalChart.AI Astrology
Swiss Ephemeris astrology: natal charts, transits, synastry, solar returns and astrocartography.
Connect it
Settings → Connectors → Add custom connector
URL: https://www.natalchart.ai/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://www.natalchart.ai/mcp{
"mcpServers": {
"astrology": {
"url": "https://www.natalchart.ai/mcp",
"headers": {
"Authorization": "<YOUR_AUTHORIZATION>"
}
}
}
}claude mcp add --transport http astrology https://www.natalchart.ai/mcp --header "Authorization: <value>"{
"servers": {
"astrology": {
"type": "http",
"url": "https://www.natalchart.ai/mcp",
"headers": {
"Authorization": "<YOUR_AUTHORIZATION>"
}
}
}
}10 tools, verified live
natal_chartread-onlyA 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, retrograde bodies, dominant element and quality), or one part: planets, angles, houses, aspects, elements,
daily_transitsread-onlyThe 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 the general sky of that day.
skyread-onlyPlanetary 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.
usageread-onlyYour 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.
transitsread-onlyUp 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.
synastryread-onlyTwo 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_returnread-onlyThe 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_daysread-onlyEvery 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_scoreread-onlyOne 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_citiesread-onlyThe 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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