The only Vedic chart API with a published test vector you can
verify against. Point your CI at
/api/v1/chart/test-vector and you'll know within seconds
if the engine has drifted — no other vendor in this niche ships that.
| Capability | Chart Engine API | ProKerala | VedicRishi | Astrology-API.com |
|---|---|---|---|---|
| Public verification vector | ✓ Yes — deterministic, no auth | — | — | — |
| Arcminute-accuracy claim | ✓ Documented — automated Swiss Ephemeris cross-check | Not published | Not published | Not published |
| True Lahiri / Chitrapaksha ayanamsa | ✓ Locked | Configurable | Configurable | Western-first |
| D9 + D10 vargas in v1 response | ✓ Included | Separate endpoints | Separate endpoints | Limited |
| Vimshottari dasha | ✓ Included | Included | Included | Basic |
| Free sandbox tier | ✓ 60 req/min · 1k/mo | Trial only | Trial only | Trial only |
| Anti-signal ledger (published nulls) | ✓ Public | — | — | — |
| Structured error responses | ✓ error / code / details | Ad-hoc | Ad-hoc | Structured |
| OpenAPI spec | ✓ /api/v1/openapi.json |
— | — | Docs only |
| Indian market pricing (INR) | ✓ ₹2k / ₹10k | ₹5k–₹15k | Similar range | USD only |
Every chart we compute is cross-checked against an independent Swiss
Ephemeris path across thousands of births. The only differences are
sub-arcminute Mercury/Venus light-time convention (astrologically
inert). We publish the test vector at
/api/v1/chart/test-vector — a fixed birth, deterministic
response, no auth. If our engine drifts, your CI catches it before we
do. No other vendor in this niche exposes this.
When we ship a claim about a Vedic pattern, we also ship the nulls we found. Our research pipeline publishes both what worked and what didn't — searchable, versioned, dated. The competition ships pattern lists with no falsification receipts. If your product depends on astrology holding up to scrutiny (matrimonial, dating, HR), this matters.
Our v1 response is a curated subset of the engine's internal chart. Additive changes (new fields, new vargas) are safe; breaking changes go through a versioned changelog. Your integration doesn't rot when we improve the engine.
Full pricing detail on the pricing page. Enterprise (custom rate, DPA, dedicated support) is contact-sales.