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Western astrology

Available

Harmonic Chart API

A harmonic chart (John Addey): every planet and angle at its longitude times the harmonic number, modulo 360, with its sign and degree, and the conjunctions that form in the harmonic chart (8 degree orb) with their natal angle.

  • POST /v1/western/western-harmonic-chart
  • 1 credit
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Request
curl https://api.96astroapi.com/v1/western/western-harmonic-chart \  -H "Authorization: Bearer $ASTRO_API_KEY" \  -H "Content-Type: application/json" \  -d '{
      "datetime": "1990-10-18T14:30:00",
      "timezone": "Asia/Kolkata",
      "latitude": 28.6139,
      "longitude": 77.209,
      "harmonic": 5
    }'

Overview

A harmonic chart (John Addey): every planet and angle at its longitude times the harmonic number, modulo 360, with its sign and degree, and the conjunctions that form in the harmonic chart (8 degree orb) with their natal angle.

Call it with POST /v1/western/western-harmonic-chart. Input: birth details. Output: JSON, as a direct response. Each successful call costs 1 credit.

  • POST /v1/western/western-harmonic-chart
  • 1 credit
  • Birth details

Try it

Runs the real calculation, free and without a key, a few times a minute. For more, and for AI readings, get a free sandbox key.

Response

Ready when you are

Press Run it to see the live response here.

Example response

Fields in dataMeasured from 6 real answers to different inputs: a required field was in every one.

  • harmonicnumber
  • julian_daynumber
  • pointsarray of object
  • conjunctionsarray of object
  • orbnumber
200Example response

Captured from the live engine with a sandbox key (so credits_used is 0) and trimmed: long arrays keep their first items and images are replaced by a placeholder.

Loading the example…

Request schema and every field: the Western astrology reference.

Related endpoints

FAQ

Harmonic Chart API: common questions

4answers

Ask the team
01What does the Harmonic Chart API return?

A harmonic chart (John Addey): every planet and angle at its longitude times the harmonic number, modulo 360, with its sign and degree, and the conjunctions that form in the harmonic chart (8 degree orb) with their natal angle. The response's data object includes harmonic, julian_day, points, conjunctions and orb. See the reference for an example response.

02What input does Harmonic Chart need?

Birth details.

03How much does a Harmonic Chart call cost?

1 credit per successful call; a failed call is not charged. Plans and top-ups are on the pricing page.

04Can I try it before paying?

Yes. Every account gets sandbox keys and trial credits, so you can call it from your own code before choosing a plan.