Vertex and Anti-Vertex — Now on VedIntel™ AstroAPI

The Vertex is a real, sought-after point in Western relationship astrology — where it falls in synastry between two charts is treated as marking encounters that feel fated rather than chosen. It's a genuine mathematical point, not a technique variant: the intersection of the ecliptic with the prime vertical.

What the endpoint returns

GET /horoscope/vertex returns both the Vertex and the Anti-Vertex — exactly 180° opposite it, mathematically required and confirmed in testing. Each comes with sign, house, and nakshatra placement, same as any other chart point.

GET /api/v1/horoscope/vertex?dob=27/08/1976&tob=10:05&lat=12.98&lon=77.59&tz=5.5&api_key=...

{
  "status": 200,
  "response": {
    "vertex": { "global_degree": 307.32, "zodiac": "Aquarius", "house": 5, "nakshatra": "Shatabhisha" },
    "anti_vertex": { "global_degree": 127.32, "zodiac": "Leo", "house": 11, "nakshatra": "Magha" }
  }
}

Independent of house system

Unlike house cusps, the Vertex's degree doesn't change based on which house system you use — it's a genuine astronomical point, not a house-division artifact. Verified directly: the same birth data returns an identical Vertex longitude under Whole Sign, Placidus, and Koch. Only which house it falls in shifts, since that part does depend on house boundaries.

Who this is for

Relationship and synastry apps built for a Western audience — comparing one partner's planets against the other's Vertex/Anti-Vertex axis is a real, specific technique that basic sign-compatibility matching doesn't cover. Available on Starter plan and above.