vedicproof
vedic proof · computation

Navamsa API

What is a Navamsa API?

A Navamsa API returns the D9 chart: each rasi is divided into nine parts of 3°20', and every graha is re-placed according to which part it occupies. It is the divisional chart most often read alongside the rasi chart, particularly for marriage and for the underlying strength of a placement.

Request

Tools are called over MCP, so an assistant connected to https://vedicproof.com/mcp invokes get_databank itself. The arguments it sends are:

tool · get_databank
{
  "date_of_birth": "1994-01-19",
  "time_of_birth": "05:22",
  "city": "Kochi",
  "country": "India",
  "datasets": [
    "vargas"
  ]
}

Response

Every response carries a plain-language summary string plus structured data, and states the engine and ayanamsa it used. Abridged here for length.

result · json
{ "data": { "vargas": { "D9": { "Lagna": "Kanya", "Sun": "Vrischika", "Moon": "Mithuna", "Mars": "Meena" } } } }

How is this calculated and verified?

These are the pinned parameters that affect this computation. The full disclosure, and the golden-chart corpus, live on /proof.

Divisional chart formulasClassical cyclic division; D1, D2, D3, D7, D9, D10, D12
Each varga sign is floor(sidereal longitude x divisor / 30) mod 12 - the plain cyclical derivation. D16 and above are not published because their competing derivations would need naming before they mean anything. We compute what we list and nothing more.
AyanamsaLahiri (Chitrapaksha), mean
Single supported system today, computed as a polynomial in Julian centuries from J2000 rather than read from a table. True-Chitra, KP-Newcomb and Raman are not offered; that is a limitation, not a default we are hiding.
Rounding and boundariesAssigned on unrounded longitude; displayed to the arc-minute
Rasi, nakshatra and pada are assigned from the full-precision longitude before any rounding, so a graha at 29.9999° stays in its own rasi. Degrees are formatted d° mm' ss" for display only.

Common questions

Why is the navamsa read with the rasi chart?
A graha strong in D1 but weak in D9 is traditionally read as promising less than it appears. The pairing is the point, which is why both come from one call.
How wide is one navamsa?
Three degrees and twenty minutes. A graha within a few arc-minutes of that boundary can land either side, which is why boundaries are assigned before rounding.
Do you return a navamsa lagna?
Yes, computed from the ascendant longitude by the same ninefold division.

Connect this to Claude or ChatGPT with one URL: https://vedicproof.com/mcp. First 14 days unlimited and free, then $1.99/month.

claude setup →chatgpt setup →pricing →

Related computations

all computations in docs →