Natal Aspects

Endpoint POST https://starsapi.com/api/v3/western/predictions/aspects

Computes the tropical natal chart and finds all major aspects (conjunction, sextile, square, trine, opposition) between every pair of bodies in the chart — 10 planets, Chiron, Lilith (Black Moon), Part of Fortune, Ascendant, and Midheaven. Each in-orb aspect is returned with its geometry (exact angle, actual angle in decimal and DMS, orb deviation), an applying/separating flag, a one-word nature label for UI colour-coding, and a prewritten interpretation of roughly 100 words.

Orbs follow standard Western defaults but can be overridden per aspect type via the optional orbs object.

Nature labels — each aspect carries a one-word nature field for instant UI mapping:

Fusion — conjunction (0°)
Smooth — sextile (60°)
Friction — square (90°)
Lucky — trine (120°)
Tense — opposition (180°)

Authentication

Method	Example
Header (recommended)	`X-Api-Key: am_live_xxxxxxxxxxxx`
Bearer	`Authorization: Bearer am_live_xxxxxxxxxxxx`
Query	`?api_key=am_live_xxxxxxxxxxxx`

Request body

Field	Type	Required	Description
`year`	integer	Yes	Birth year (1800–2400).
`month`	integer	Yes	Birth month, 1–12.
`day`	integer	Yes	Birth day.
`hour`	integer	Yes	Birth hour, 0–23 (24-hour).
`minute`	integer	Yes	Birth minute, 0–59.
`second`	integer	No	Birth second, default 0.
`latitude`	number	Yes	Decimal degrees, −90 to 90.
`longitude`	number	Yes	Decimal degrees, −180 to 180.
`timezone`	string	Yes	IANA timezone (e.g. `Asia/Kolkata`).
`language`	string	No	Language code. Supported: `en`, `es` (Spanish), `fr` (French), `pt` (Portuguese), `it` (Italian), `de` (German), `ru` (Russian). Default `en`. Falls back to English when the requested language has no entry.
`house_system`	string	No	Any of 23 supported systems. Default `placidus`. See house systems.
`node_type`	string	No	One of `true`, `mean`, `both`. Default `true`.
`orbs`	object	No	Override default orbs per aspect type. Keys: `conjunction`, `sextile`, `square`, `trine`, `opposition`. Values in degrees (0.5–15). Omitted keys use defaults.

Default orbs

Aspect	Angle	General orb	Sun/Moon orb
Conjunction	0°	8°	10°
Sextile	60°	6°	6°
Square	90°	8°	10°
Trine	120°	8°	10°
Opposition	180°	8°	10°

When custom orbs are supplied via the orbs object, the provided value replaces both general and Sun/Moon orbs for that aspect type. Luminaries do not receive a widened orb in custom mode.

Custom orbs example

{
  "year": 1990, "month": 5, "day": 20,
  "hour": 14, "minute": 30, "second": 0,
  "latitude": 28.6139, "longitude": 77.2090,
  "timezone": "Asia/Kolkata",
  "orbs": {
    "conjunction": 6,
    "sextile": 3,
    "square": 5,
    "trine": 5,
    "opposition": 6
  }
}

Supported house systems

Value	System
`placidus`	Placidus (default)
`koch`	Koch
`porphyry`	Porphyry
`regiomontanus`	Regiomontanus
`campanus`	Campanus
`equal`	Equal (Ascendant)
`whole_sign`	Whole Sign
`meridian` / `axial`	Meridian / Axial Rotation
`morinus`	Morinus
`alcabitius`	Alcabitius
`topocentric`	Topocentric (Polich-Page)
`vehlow_equal`	Vehlow Equal
`krusinski`	Krusinski-Pisa
`equal_mc`	Equal (MC)
`equal_aries`	Equal (1=Aries)
`sripati`	Sripati
`horizontal` / `azimuthal`	Horizontal / Azimuthal
`gauquelin`	Gauquelin Sectors
`apc`	APC Houses
`pullen_sd`	Pullen Sinusoidal Delta
`pullen_sr`	Pullen Sinusoidal Ratio
`sunshine`	Sunshine
`carter`	Carter Poli-Equatorial

Bodies included

Aspects are computed between all unique pairs of the following 15 bodies:

Category	Bodies
Planets	Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto
Minor bodies	Chiron, Lilith (Mean Black Moon)
Calculated points	Part of Fortune (Asc + Moon − Sun)
Chart angles	Ascendant (Asc), Midheaven (MC)

Response shape

Field	Type	Description
`language`	string	Language served.
`aspects[]`	array	One entry per in-orb aspect found. Only active (in-orb) aspects are returned; pairs with no aspect in orb are omitted.
`.planet_1`	string	First body name.
`.planet_2`	string	Second body name.
`.aspect`	string	One of `conjunction`, `sextile`, `square`, `trine`, `opposition`.
`.nature`	string	UI label: `Fusion`, `Smooth`, `Friction`, `Lucky`, or `Tense`.
`.exact_angle`	integer	The theoretical angle (0, 60, 90, 120, 180).
`.actual_angle`	number	Actual angular separation in decimal degrees.
`.actual_angle_dms`	string	Actual separation in degrees°minutes′seconds″ format.
`.orb_deviation`	number	Deviation from exact, in decimal degrees.
`.orb_deviation_dms`	string	Deviation in DMS format.
`.applying`	boolean	`true` if the aspect is tightening (getting closer to exact), `false` if separating.
`.prediction`	object\|null	`{"title":…, "text":…}` when a prewritten entry exists; `null` when no content is available for that combination.

Errors

HTTP	Code	Cause
400	`MISSING_FIELD`	Required field absent.
400	`INVALID_DATE`	Bad calendar date or year out of range.
400	`INVALID_PARAM`	Bad `language` or `node_type` value.
400	`INVALID_TIMEZONE`	Non-IANA timezone.
400	`INVALID_COORDINATE`	Lat/lon out of range.
405	`METHOD_NOT_ALLOWED`	Non-POST request.
500	`COMPUTE_ERROR`	Chart computation failed.

# Replace YOUR_API_KEY with the key from your dashboard
curl -X POST "https://starsapi.com/api/v3/western/predictions/aspects" \
  -H "X-Api-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
        "name": "Priya",
        "gender": "female",
        "year": 1990,
        "month": 5,
        "day": 20,
        "hour": 14,
        "minute": 30,
        "second": 0,
        "latitude": 28.6139,
        "longitude": 77.209,
        "timezone": "Asia/Kolkata",
        "language": "en"
    }'

const response = await fetch(
  'https://starsapi.com/api/v3/western/predictions/aspects',
  {
    method: 'POST',
    headers: {
      'X-Api-Key': 'YOUR_API_KEY',
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      name: 'Priya',
      gender: 'female',
      year: 1990,
      month: 5,
      day: 20,
      hour: 14,
      minute: 30,
      second: 0,
      latitude: 28.6139,
      longitude: 77.209,
      timezone: 'Asia/Kolkata',
      language: 'en'
    })
  }
);
const result = await response.json();

if (result.success) {
  console.log(result.data);
}

import requests
import os

response = requests.post(
    'https://starsapi.com/api/v3/western/predictions/aspects',
    headers={'X-Api-Key': os.environ['STARSAPI_KEY']},
    json={
        'name': 'Priya',
        'gender': 'female',
        'year': 1990,
        'month': 5,
        'day': 20,
        'hour': 14,
        'minute': 30,
        'second': 0,
        'latitude': 28.6139,
        'longitude': 77.209,
        'timezone': 'Asia/Kolkata',
        'language': 'en'
    }
)
result = response.json()

if result['success']:
    print(result['data'])

<?php
$payload = [
    'name' => 'Priya',
    'gender' => 'female',
    'year' => 1990,
    'month' => 5,
    'day' => 20,
    'hour' => 14,
    'minute' => 30,
    'second' => 0,
    'latitude' => 28.6139,
    'longitude' => 77.209,
    'timezone' => 'Asia/Kolkata',
    'language' => 'en',
];

$ch = curl_init('https://starsapi.com/api/v3/western/predictions/aspects');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($payload));
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'X-Api-Key: ' . getenv('STARSAPI_KEY'),
    'Content-Type: application/json'
]);

$response = curl_exec($ch);
$data = json_decode($response, true);

if ($data['success']) {
    print_r($data['data']);
}

import 'package:http/http.dart' as http;
import 'dart:convert';

Future<Map<String, dynamic>> getAscendant() async {
  final response = await http.post(
    Uri.parse('https://starsapi.com/api/v3/western/predictions/aspects'),
    headers: {
      'X-Api-Key': 'YOUR_API_KEY',
      'Content-Type': 'application/json',
    },
    body: jsonEncode({
      'name': 'Priya',
      'gender': 'female',
      'year': 1990,
      'month': 5,
      'day': 20,
      'hour': 14,
      'minute': 30,
      'second': 0,
      'latitude': 28.6139,
      'longitude': 77.209,
      'timezone': 'Asia/Kolkata',
      'language': 'en',
    }),
  );
  return jsonDecode(response.body);
}

import Foundation

func getAscendant() async throws -> [String: Any] {
    var request = URLRequest(url: URL(string:
        "https://starsapi.com/api/v3/western/predictions/aspects"
    )!)
    request.httpMethod = "POST"
    request.setValue("YOUR_API_KEY", forHTTPHeaderField: "X-Api-Key")
    request.setValue("application/json", forHTTPHeaderField: "Content-Type")
    request.httpBody = """
        {
            "name": "Priya",
            "gender": "female",
            "year": 1990,
            "month": 5,
            "day": 20,
            "hour": 14,
            "minute": 30,
            "second": 0,
            "latitude": 28.6139,
            "longitude": 77.209,
            "timezone": "Asia/Kolkata",
            "language": "en"
        }
        """.data(using: .utf8)

    let (data, _) = try await URLSession.shared.data(for: request)
    return try JSONSerialization.jsonObject(with: data) as! [String: Any]
}

import okhttp3.*
import org.json.JSONObject

val client = OkHttpClient()
val JSON = "application/json; charset=utf-8".toMediaType()

fun getAscendant(callback: (JSONObject) -> Unit) {
    val payload = """
    {
        "name": "Priya",
        "gender": "female",
        "year": 1990,
        "month": 5,
        "day": 20,
        "hour": 14,
        "minute": 30,
        "second": 0,
        "latitude": 28.6139,
        "longitude": 77.209,
        "timezone": "Asia/Kolkata",
        "language": "en"
    }
    """.trimIndent()

    val request = Request.Builder()
        .url("https://starsapi.com/api/v3/western/predictions/aspects")
        .addHeader("X-Api-Key", "YOUR_API_KEY")
        .post(payload.toRequestBody(JSON))
        .build()

    client.newCall(request).enqueue(object : Callback {
        override fun onResponse(call: Call, response: Response) {
            callback(JSONObject(response.body!!.string()))
        }
        override fun onFailure(call: Call, e: java.io.IOException) {
            e.printStackTrace()
        }
    })
}

package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "net/http"
    "os"
)

func main() {
    payload, _ := json.Marshal(map[string]interface{}{
        "name": "Priya",
        "gender": "female",
        "year": 1990,
        "month": 5,
        "day": 20,
        "hour": 14,
        "minute": 30,
        "second": 0,
        "latitude": 28.6139,
        "longitude": 77.209,
        "timezone": "Asia/Kolkata",
        "language": "en",
    })

    req, _ := http.NewRequest("POST",
        "https://starsapi.com/api/v3/western/predictions/aspects",
        bytes.NewBuffer(payload))
    req.Header.Set("X-Api-Key", os.Getenv("STARSAPI_KEY"))
    req.Header.Set("Content-Type", "application/json")

    resp, _ := http.DefaultClient.Do(req)
    defer resp.Body.Close()

    var result map[string]interface{}
    json.NewDecoder(resp.Body).Decode(&result)
    fmt.Println(result["data"])
}

require 'net/http'
require 'json'

uri = URI('https://starsapi.com/api/v3/western/predictions/aspects')
payload = {
  'name' => 'Priya',
  'gender' => 'female',
  'year' => 1990,
  'month' => 5,
  'day' => 20,
  'hour' => 14,
  'minute' => 30,
  'second' => 0,
  'latitude' => 28.6139,
  'longitude' => 77.209,
  'timezone' => 'Asia/Kolkata',
  'language' => 'en'
}

req = Net::HTTP::Post.new(uri)
req['X-Api-Key'] = ENV['STARSAPI_KEY']
req['Content-Type'] = 'application/json'
req.body = payload.to_json

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
res = http.request(req)

data = JSON.parse(res.body)
puts data['data'] if data['success']

200 RESPONSE

{
  "status": 200,
  "success": true,
  "data": {
    "language": "en",
    "aspects": [
      {
        "planet_1": "Sun",
        "planet_2": "Moon",
        "aspect": "sextile",
        "nature": "Smooth",
        "exact_angle": 60,
        "actual_angle": 57.6257,
        "actual_angle_dms": "57\u00b037'33\"",
        "orb_deviation": 2.3743,
        "orb_deviation_dms": "2\u00b022'27\"",
        "applying": false,
        "prediction": {
          "title": "Sun Sextile Moon",
          "text": "A natural ease flows between your sense of purpose and your emotional responses\u2026"
        }
      },
      {
        "planet_1": "Jupiter",
        "planet_2": "Uranus",
        "aspect": "opposition",
        "nature": "Tense",
        "exact_angle": 180,
        "actual_angle": 178.5779,
        "actual_angle_dms": "178\u00b034'40\"",
        "orb_deviation": 1.4221,
        "orb_deviation_dms": "1\u00b025'20\"",
        "applying": false,
        "prediction": {
          "title": "Jupiter Opposition Uranus",
          "text": "A dynamic polarity operates between your desire for expansive meaning\u2026"
        }
      }
    ]
  },
  "meta": { "endpoint": "/api/v3/western/predictions/aspects", "version": "3.0" }
}