Founder access · ₹99 · first 50 only

Vedic astrology, computed properly.

JPL DE440-grade ephemeris computation, packaged as an API. Sidereal positions, Vimshottari periods, full charts — the same precision NASA uses for spacecraft navigation, available for your product.

1e-9° tolerance vs JPL Horizons 56ms p95 from asia-south1 … of 50 founder slots remaining

What you get

✓ JPL DE440 sidereal longitudes for all 9 grahas with classical motion flags
✓ Vimshottari mahadasha + antardasha periods aligned to birth details
✓ Full sidereal chart with houses and rāśi context
✓ Service-to-service authentication, stable JSON, audit trail on every response

Endpoints today

Three production endpoints in private beta. Fully documented OpenAPI 3.1 contract — request, response, and error shapes are stable.

POST /positions/sidereal

Sidereal longitudes and retrograde state for all classical grahas (Sun → Ketu).

POST /chart/sidereal

Full sidereal chart payload — rāśi, houses, ascendant, planet placements.

POST /dasha

Vimshottari mahadasha and antardasha periods aligned to birth time + place.

Verifiable, not magic

Every response from Daanyam Astro Engine carries computation metadata. You can audit what we computed with — kernel, ayanamsa version, engine build, validation baseline. Below is live data fetched from our public /provenance endpoint at build time.

{
  "kernel_id": "de440_jpl_official",
  "ayanamsa_id": "lahiri_swe_zero_epoch_iau1976_v1",
  "engine_version": "0.18.0",
  "tolerance_arcsec": "1e-9°",
  "validation_baseline": "JPL Horizons",
  "build_date": "snapshot"
}

How it compares

We're new. Here's the honest picture vs the two dominant options today.

Capability	Daanyam	Prokerala API	swisseph-JS
Ephemeris source	JPL DE440 · 1e-9°	Undisclosed	SWE 2.x · ~1e-6°
Provenance metadata	Full /provenance	None	None
Latency p95 (India)	56ms	200–400ms	~10ms (in-process JS)
Audit trail	CHANGELOG + golden tests	None	None
Self-hostable	Yes (Cloud Run / container)	No	Yes (npm)

Drop-in samples

Same request, three languages. Replace YOUR_FOUNDER_KEY with the API key emailed to you after payment.

curl -X POST https://astro-engine-6ucc3jlvga-el.a.run.app/positions/sidereal \
  -H "x-api-key: YOUR_FOUNDER_KEY" \
  -H "content-type: application/json" \
  -d '{
    "datetime": { "kind": "utc", "utc": "2024-01-01T00:00:00Z" },
    "geo": { "latitude_deg": 12.9716, "longitude_deg": 77.5946, "elevation_m": 920.0 },
    "ayanamsa": "lahiri"
  }'

const res = await fetch("https://astro-engine-6ucc3jlvga-el.a.run.app/positions/sidereal", {
  method: "POST",
  headers: {
    "x-api-key": process.env.DAANYAM_API_KEY,
    "content-type": "application/json",
  },
  body: JSON.stringify({
    datetime: { kind: "utc", utc: "2024-01-01T00:00:00Z" },
    geo: { latitude_deg: 12.9716, longitude_deg: 77.5946, elevation_m: 920.0 },
    ayanamsa: "lahiri",
  }),
});
const { data } = await res.json();
console.log(data.grahas[0]); // Sun position with sidereal_longitude_deg

import os, requests

resp = requests.post(
    "https://astro-engine-6ucc3jlvga-el.a.run.app/positions/sidereal",
    headers={
        "x-api-key": os.environ["DAANYAM_API_KEY"],
        "content-type": "application/json",
    },
    json={
        "datetime": {"kind": "utc", "utc": "2024-01-01T00:00:00Z"},
        "geo": {"latitude_deg": 12.9716, "longitude_deg": 77.5946, "elevation_m": 920.0},
        "ayanamsa": "lahiri",
    },
)
data = resp.json()["data"]
print(data["grahas"][0])  # Sun position

What's coming

Now (founder beta)

· /positions/sidereal
· /chart/sidereal
· /dasha
· /provenance

Next 4 weeks

· D9 (Navamsha) divisional chart
· Yoga library v1 (15 yogas)
· Raman + KP ayanamsa
· OpenAPI public docs

Later

· Full 16-varga suite (D1–D60)
· NAPI / WASM SDK
· Public API portal + billing
· Practitioner tier

Pricing

Founder

Right now

₹99 one-time

· All current endpoints
· 10,000 requests / month
· Auto-access to roadmap endpoints as they ship
· Founder pricing locked for 12 months when public

First 50 builders only.

When public

From ₹999 /month

· Starter / Growth / Practitioner tiers
· Public API portal + billing
· Higher quotas, SLA options
· Founder slot members keep founder rate

FAQ

What does the ₹99 founder slot get me? +

An API key valid against all current endpoints (/positions/sidereal, /chart/sidereal, /dasha, /provenance) with a 10,000 request/month quota. Roadmap endpoints unlock automatically as they ship — D9 Navamsha, yoga library, additional ayanamsas. When we open public access, founder-slot members get founder pricing locked for 12 months.

How is this different from Prokerala or other astrology APIs? +

Two things. First, accuracy: we compute against the JPL DE440 ephemeris kernel directly, the same source NASA uses for spacecraft navigation. Second, auditability: every response carries computation metadata so you can verify exactly what was computed with — kernel, ayanamsa version, engine build. We publish our golden tests and JPL Horizons regression deltas openly.

Is the data accurate enough for production use? +

For positions, dasha, and sidereal charts: yes. Tolerance is 1e-9° vs JPL Horizons baseline. For divisional charts and yoga detection, we're in active development — those land in the next few weeks.

What if I miss the first 50 slots? +

The waitlist captures intent for the next batch. We open additional capacity in stages as engine reliability and feature surface mature. Waitlist is shown automatically once founder slots are claimed.

Refund policy? +

If we can't issue your key within 24 hours of a successful payment, we refund automatically. If you decide the API doesn't fit your need within the first 7 days and have made fewer than 100 calls, email support@daanyam.in for a manual refund.