Arabic Parts (Lots)

Endpoint POST https://starsapi.com/api/v3/western/natal/arabic-parts

Overview

Computes 20 classical Arabic Parts (also called Hellenistic Lots). Each lot is a calculated point derived from the formula ASC + Planet A − Planet B. The most famous is the Part of Fortune (also available inline in the planets endpoint).

Sect-aware: lots marked as “reverse at night” swap the additive and subtractive planets in nocturnal charts (Sun below the horizon). The response shows the chart_sect and the actual formula used for each lot, so you can verify the calculation.

Arabic Parts are experiencing a major revival in the Hellenistic/traditional Western astrology community. They provide targeted insight into specific life topics (love, career, health, etc.) that generic planet placements don’t address.

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).
`minute`	integer	Yes	Birth minute (0–59).
`second`	integer	No	Default `0`.
`latitude`	number	Yes	Decimal degrees.
`longitude`	number	Yes	Decimal degrees.
`timezone`	string	Yes	IANA timezone.
`house_system`	string	No	Default `placidus`. Affects house placement of lots.
`node_type`	string	No	`true`, `mean`, or `both`. Default `true`.

Response shape

`data.chart_sect`

"diurnal" or "nocturnal". Determines which formula variant is used for reversible lots.

`data.lots[]`

Field	Type	Description
`name`	string	Lot name (e.g. `"Part of Fortune"`).
`longitude`	number	Absolute tropical longitude (0–360).
`sign`	string	Zodiac sign.
`sign_number`	integer	1–12.
`sign_symbol`	string	Unicode symbol.
`degree_in_sign`	number	0–29.99.
`degree_in_sign_dms`	string	DMS format.
`house`	integer	House placement (1–12).
`formula`	string	Actual formula used (e.g. `"ASC + Moon - Sun (day)"`).
`description`	string	Brief meaning of this lot.

All 20 lots

Lot	Day formula	Night reversal	Topic
Part of Fortune	ASC + Moon − Sun	Yes	Luck, body, material wellbeing
Part of Spirit	ASC + Sun − Moon	Yes	Soul, will, spiritual direction
Part of Love	ASC + Venus − Sun	Yes	Romantic love, attraction
Part of Marriage	ASC + Venus − Saturn	No	Committed partnerships
Part of Death	ASC + Saturn − Moon	No	Mortality, endings
Part of Illness	ASC + Mars − Saturn	No	Health vulnerabilities
Part of Commerce	ASC + Mercury − Sun	Yes	Trade, business
Part of Father	ASC + Saturn − Sun	Yes	Father, authority
Part of Mother	ASC + Moon − Venus	Yes	Mother, nurturing
Part of Children	ASC + Jupiter − Saturn	No	Offspring, fertility
Part of Siblings	ASC + Jupiter − Saturn	Yes	Brothers, sisters
Part of Friends	ASC + Moon − Mercury	No	Friendships, alliances
Part of Enemies	ASC + Saturn − Mars	No	Adversaries, opposition
Part of Career	ASC + Saturn − Moon	Yes	Profession, ambition
Part of Travel	ASC + Mercury − Moon	No	Journeys, foreign lands
Part of Faith	ASC + Mercury − Moon	Yes	Religion, belief systems
Part of Courage	ASC + Mars − Moon	No	Bravery, initiative
Part of Victory	ASC + Jupiter − Mars	No	Success, triumph
Part of Necessity	ASC + Saturn − Mercury	Yes	Fate, karmic debts
Part of Nemesis	ASC + Saturn − Sun	Yes	Hidden enemies, self-undoing

Errors

HTTP	Code	Cause
400	`MISSING_FIELD`	Required field absent.
400	`INVALID_DATE`	Invalid date.
400	`INVALID_TIME`	Time outside range.
400	`INVALID_TIMEZONE`	Not valid IANA.
400	`INVALID_COORDINATE`	Out of range.
400	`INVALID_PARAM`	Invalid `house_system`.
500	`EPHEMERIS_ERROR`	Computation failed.

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

const response = await fetch(
  'https://starsapi.com/api/v3/western/natal/arabic-parts',
  {
    method: 'POST',
    headers: {
      'X-Api-Key': 'YOUR_API_KEY',
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      year: 1990,
      month: 5,
      day: 20,
      hour: 14,
      minute: 30,
      second: 0,
      latitude: 28.6139,
      longitude: 77.209,
      timezone: 'Asia/Kolkata',
      house_system: 'placidus'
    })
  }
);
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/natal/arabic-parts',
    headers={'X-Api-Key': os.environ['STARSAPI_KEY']},
    json={
        'year': 1990,
        'month': 5,
        'day': 20,
        'hour': 14,
        'minute': 30,
        'second': 0,
        'latitude': 28.6139,
        'longitude': 77.209,
        'timezone': 'Asia/Kolkata',
        'house_system': 'placidus'
    }
)
result = response.json()

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

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

$ch = curl_init('https://starsapi.com/api/v3/western/natal/arabic-parts');
curl_setopt($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/natal/arabic-parts'),
    headers: {
      'X-Api-Key': 'YOUR_API_KEY',
      'Content-Type': 'application/json',
    },
    body: jsonEncode({
      'year': 1990,
      'month': 5,
      'day': 20,
      'hour': 14,
      'minute': 30,
      'second': 0,
      'latitude': 28.6139,
      'longitude': 77.209,
      'timezone': 'Asia/Kolkata',
      'house_system': 'placidus',
    }),
  );
  return jsonDecode(response.body);
}

import Foundation

func getAscendant() async throws -> [String: Any] {
    var request = URLRequest(url: URL(string:
        "https://starsapi.com/api/v3/western/natal/arabic-parts"
    )!)
    request.httpMethod = "POST"
    request.setValue("YOUR_API_KEY", forHTTPHeaderField: "X-Api-Key")
    request.setValue("application/json", forHTTPHeaderField: "Content-Type")
    request.httpBody = """
        {
            "year": 1990,
            "month": 5,
            "day": 20,
            "hour": 14,
            "minute": 30,
            "second": 0,
            "latitude": 28.6139,
            "longitude": 77.209,
            "timezone": "Asia/Kolkata",
            "house_system": "placidus"
        }
        """.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 = """
    {
        "year": 1990,
        "month": 5,
        "day": 20,
        "hour": 14,
        "minute": 30,
        "second": 0,
        "latitude": 28.6139,
        "longitude": 77.209,
        "timezone": "Asia/Kolkata",
        "house_system": "placidus"
    }
    """.trimIndent()

    val request = Request.Builder()
        .url("https://starsapi.com/api/v3/western/natal/arabic-parts")
        .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{}{
        "year": 1990,
        "month": 5,
        "day": 20,
        "hour": 14,
        "minute": 30,
        "second": 0,
        "latitude": 28.6139,
        "longitude": 77.209,
        "timezone": "Asia/Kolkata",
        "house_system": "placidus",
    })

    req, _ := http.NewRequest("POST",
        "https://starsapi.com/api/v3/western/natal/arabic-parts",
        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/natal/arabic-parts')
payload = {
  'year' => 1990,
  'month' => 5,
  'day' => 20,
  'hour' => 14,
  'minute' => 30,
  'second' => 0,
  'latitude' => 28.6139,
  'longitude' => 77.209,
  'timezone' => 'Asia/Kolkata',
  'house_system' => 'placidus'
}

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": {
    "chart_sect": "diurnal",
    "lots": [
      {
        "name": "Part of Fortune",
        "longitude": 122.348,
        "sign": "Leo",
        "sign_number": 5,
        "sign_symbol": "♌",
        "degree_in_sign": 2.348,
        "degree_in_sign_dms": "2°20'52\"",
        "house": 11,
        "formula": "ASC + Moon - Sun (day)",
        "description": "Material wellbeing, luck, physical body"
      },
      {
        "name": "Part of Spirit",
        "longitude": 237.599,
        "sign": "Scorpio",
        "sign_number": 8,
        "degree_in_sign_dms": "27°35'57\"",
        "house": 2,
        "formula": "ASC + Sun - Moon (day)",
        "description": "Soul purpose, will, spiritual direction"
      }
    ],
    "total_lots": 20
  },
  "meta": { "endpoint": "/api/v3/western/natal/arabic-parts", "version": "3.0" }
}