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D9 Chart API

What is a D9 chart API?

A D9 chart API returns the ninth divisional chart of a nativity. Each thirty-degree rasi is split into nine segments of three degrees twenty minutes, and a graha's D9 sign follows from the segment it falls in. It is requested together with D1 so the two can be compared directly.

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",
    "planets"
  ]
}

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": { "D1": { "Moon": "Kumbha" }, "D9": { "Moon": "Mithuna" } } } }

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.
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

Is D9 the same as navamsa?
Yes. D9 is the shorthand, navamsa the Sanskrit name, and both refer to the ninefold division.
Can I get D9 alone?
The vargas dataset returns all seven computed divisionals in one object; filter client-side for D9. There is no per-varga fee.
Does D9 need an exact birth time?
For the grahas, no more than D1 does. For the D9 lagna, yes - the ascendant moves about one navamsa every eight minutes.

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 →