A place and a time in. Every chart out. Send a birth moment and place, get back natal charts and house cusps, sidereal kundli and panchanga, a full astrocartography and relocation suite, and transit timing. Positions derive from JPL DE441 — the reference ephemeris — computed directly for the exact moment, not looked up in a table or proxied to a third party.
Pick a discipline, then a tab, fill in the inputs, and hit run. Live tabs call the actual gateway. On the Western full chart, set Dual to on to get tropical and sidereal positions back from a single request. The Astrocartography tab is one part of a full relocation suite (see below).
The full chart call returns decision-ready output: the derived fields report generators and interpretation apps normally have to build themselves, plus the bodies serious astrologers ask for and most APIs leave out.
Every field above is a real key in the live chart response. Nothing here is computed on your side.
Full astrocartography as an API — lines, parans, cities — plus the techniques that go beyond it. Almost nobody offers this; local-space is rarer still.
Every planet's rise, set, MC, and IC line across the whole world, for one birth moment.
The latitudes where two planetary lines cross — with the nearest city to each.
Which lines pass near any point and how close, and the cities nearest a chosen line.
A full chart — planets and houses — recomputed for any latitude and longitude.
Compass azimuth and altitude to every planet from a given place. Rarer than ACG itself.
Where the ecliptic meets the horizon for a place and moment — ascendant, descendant, nonagesimal.
Every planet's retrograde and direct stations across a year, ready to drop into an app or a notification feed — plus transit aspects, ingress windows, and natal transit hits.
No lookup table, no third-party feed. The gold-standard source, computed directly — and reproducible at population scale.
Positions derive from JPL DE441 — the reference ephemeris professional astronomy and software are built on.
Every position is computed from first principles for that exact moment — not looked up in a table, not interpolated, not proxied.
Positions match to under 1e-12 degrees against Swiss Ephemeris and Astrodienst — the exact engines you already trust.
Same input, same bytes out — reproducible across millions of charts and long transit spans. Built for back-testing and research.
Every figure here is measured on this engine, not a marketing estimate.
| Capability | NOUS Astrology API | Typical astrology SaaS API | Desktop astrology software |
|---|---|---|---|
| Disciplines from one endpoint | Western, Vedic, astrocartography, transits | usually one, sometimes split into separate products | varies by product |
| Median full-chart latency | 250 µs | 200–800 ms | instant, but not scriptable over HTTP |
| House systems | 13 | 1–3 | ~20 (library-dependent) |
| Sidereal (ayanāṃśa) support | 4 systems, chart and transit | often a separate product | varies by product |
| Relocation suite | ACG lines, parans, cities, relocated chart, local-space, ecliptic-horizon | rarely any ACG at all | ACG in some products |
| Asteroids, nodes, Chiron, Lilith, declinations | all in the chart | usually planets only | varies by product |
| Retrograde & direct stations | every planet, one call | rarely exposed | manual lookup |
| Tropical + sidereal in one call | yes — one flag | usually separate requests/products | varies by product |
| Source ephemeris | JPL DE441, computed directly | inherits an upstream library | reference-grade |
Grouped by discipline. Every verb is a real call against the same gateway.
Year, month, day, hour, minute, latitude, longitude — or a place name, resolved internally. Plain query parameters, no SDK required.
Western natal, sidereal Vedic, astrocartography, or transits — the same birth data drives every one.
Positions, cusps, lines, and transit hits are computed from JPL DE441 for that exact moment — including historical time zones and DST, the number-one cause of wrong charts, resolved internally.
Charts, houses, aspects, nakshatras, lines, or transit dates in a flat, predictable response.
Place and time in — nothing else. No geocoder, no timezone API, no sunrise service, no ephemeris to license or maintain. Your world today is roughly five vendors; ours is one call.
Resolve the location, handle historical time zones, compute every chart plus the full relocation suite — from a single endpoint. Stop maintaining calculation code; the peak-hour compute spikes go away and your engineers build product instead.
Self-hosting Swiss Ephemeris today? You carry two costs most teams forget: its commercial license fee, or the AGPL obligation to open-source anything you serve over a network. Our engine is independent — neither one applies to you.
Not just a generic sidereal chart. Panchanga returns tithi, karana, yoga, and vara — plus solar maasa, solar rashi, and the Tamil calendar — alongside 4 ayanāṃśa systems, full kundli, and nakshatra with pada.
Plain query parameters over HTTP. No SDK to install, no client library to version. Flat, predictable JSON back — the same response shape across every discipline.
Call it with any HTTP client. Nothing to install, nothing to keep in sync with a release cadence.
Every input is a plain query parameter — year, month, day, hour, lat, lon. Readable, cURL-able, debuggable.
Predictable keys, the same shape across disciplines. Parse once, reuse everywhere.
Pay for calls, not seats. Costs track your actual traffic, not your headcount.
{
"ok": true,
"fields": {
"sun": "12°44′ Aries",
"moon": "3°10′ Leo",
"ascendant": "18°44′ Taurus",
"mc": "22°02′ Aquarius",
"house_system": "Placidus"
},
"raw": "SUN 12.7333 ARI, MOON 3.1667 LEO, ASC 48.7333, MC 322.03"
}
One integration for natal, Vedic, relocation, and forecast features — no separate vendors to stitch together.
Bulk-produce charts, kundli, paran tables, and transit timelines for PDF/print reports at scale.
Call two charts and compare them on your end, or rank cities by planetary line in real time as a user adjusts birth data.
Reproducible, bit-exact positions across large populations of charts and long spans of transits.
Usage-based tiers — costs track your actual traffic. Start free and go break the playground before we ever talk money.
dual=1 with an ayanamsha on the natal chart call to get tropical and sidereal positions together. Four ayanāṃśa systems: Lahiri, Raman, Krishnamurti, Fagan-Bradley. Panchanga also returns solar maasa, solar rashi, and the Tamil calendar.The NOUS Astrology API is an independent product: a single endpoint that turns a place and a time into every chart — Western, Vedic, astrocartography, and transits — computed directly on JPL DE441. It's part of the Nous ARK family of independent tools, each sold on its own merits.
We publish honest limits, cross-check every position against the engines you already trust, and price by usage. The moat is that everything on this page is true.
Comparing APIs, running a high-volume workload, or want enterprise terms? Start a conversation — no price gate, just a chat about your use case.