Loading the playground
curl -X POST https://api.occultapi.com/api/astro/western/house-cusps/ \
-H "X-API-Key: $OCCULT_API_KEY" \
-H "Content-Type: application/json" \
-d '{"date_time":"1990-05-10T19:55:00+05:30","timezone_as_float":5.5,"latitude":19.2056,"longitude":25.2056,"house_system":"placidus"}'Tropical house cusps, with the ascendant, midheaven and vertex. Eight house systems: placidus (the Western default), koch, porphyry, regiomontanus, campanus, equal, whole_sign and topocentric. Pass `house_system`; it defaults to placidus. The ascendant IS the first house cusp and the midheaven IS the tenth, and this endpoint returns them from a single calculation so they cannot disagree. Two exceptions, both correct rather than bugs: under whole_sign the first cusp is 0 degrees of the sign HOLDING the ascendant, not the ascendant itself, and under equal and whole_sign the midheaven floats free of the tenth cusp because those systems divide from the ascendant rather than from the meridian. TROPICAL, not sidereal — see /api/astro/western/planets/. For Vedic houses use /api/astro/house/ or /api/astro/bhava-cusps/, which are sidereal. Opposite cusps are exactly 180 degrees apart and the twelve advance in order round the zodiac; both are asserted by tests.
| Field | Type | Required | Notes |
|---|---|---|---|
| date_time | string (date-time) | required | The moment to calculate for, ISO 8601. ALWAYS include an offset or a trailing Z - a value with no zone is read as Asia/Kolkata (UTC+05:30), not UTC, and can return the previous day's result with a 200. '2026-09-01T06:00:00Z' and '2026-09-01 06:00:00' are different instants and give different answers. |
| latitude | number (double) | required | Latitude of the place, in decimal degrees. Positive is north, negative is south. Example: 26.9124 for Jaipur, 40.7128 for New York. Minutes and seconds are not accepted - convert first. min -89.9 · max 89.9 |
| longitude | number (double) | required | Longitude of the place, in decimal degrees. Positive is east, negative is west. Example: 75.7873 for Jaipur, -74.0060 for New York. Note the sign: a missing minus puts New York in China. min -180 · max 180 |
| timezone_as_float | number (double) | required | UTC offset of the place, in hours, as a decimal. Example: 5.5 for India (UTC+05:30), -5 for New York in winter, 5.75 for Nepal. This is NOT validated against date_time - if the two disagree you get a successful response for the wrong moment, so derive both from the same source. Use the offset in force on that date, not today's: a summer birth in a country with daylight saving needs the summer offset. min -12 · max 14 |
| ayanamsa | string | optional | TROPICAL (the default) or an ayanamsa name such as LAHIRI, KRISHNAMURTI, RAMAN or FAGAN_BRADLEY, case-insensitive. A sidereal ayanamsa subtracts its value at each moment from every returned longitude. |
| house_system | string | optional | campanusequalkochplacidusporphyryregiomontanustopocentricwhole_sign |
| include_asteroid_lilith | boolean | optional | Add the asteroid (1181) Lilith, a different body from Black Moon Lilith, named "asteroid_lilith", after the other bodies. |
| include_lilith | boolean | optional | Add Black Moon Lilith (the mean lunar apogee) as a body named "lilith", after the other bodies. |
| keys | array | optional | Which calculations to return, as a list of names. See the key table for this endpoint; an unrecognised name rejects the whole request. One call costs one credit however many keys you ask for, so request everything you need at once rather than making several calls. |