Natal Chart

The POST /v1/chart endpoint is the foundation of most requests. It returns a full natal chart: planet positions, house cusps, aspects between planets, chart sect. Cost: 20 credits (Tier 2).

Request parameters

Parameter	Type	Required	Description
date	string	Yes	Birth date YYYY-MM-DD
time	string	Yes	Birth time HH:mm:ss
timezoneOffset	number	Yes	UTC offset in hours (e.g. 2 for Kyiv in summer)
latitude	number	No (0)	Latitude in decimal degrees
longitude	number	No (0)	Longitude in decimal degrees
houseSystem	string	No (P)	House system: P Placidus, K Koch, W Whole Sign, E Equal and others
name	string	No	Name (echoed in response)
city	string	No	City (echoed in response)
zodiacType	string	No	tropical (default) or sidereal
cosmogram	boolean	No	true — no houses (when location unknown)

Example request

Natal chart for Kyiv, July 14, 1990, 14:30:

cURL

curl -X POST https://api.astroway.info/v1/chart \
  -H "X-Api-Key: aw_live_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "date": "1990-07-14",
    "time": "14:30:00",
    "timezoneOffset": 3,
    "latitude": 50.4501,
    "longitude": 30.5234,
    "houseSystem": "P"
  }'

Node.js

const res = await fetch('https://api.astroway.info/v1/chart', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'X-Api-Key': process.env.ASTROWAY_API_KEY!,
  },
  body: JSON.stringify({
    date: '1990-07-14',
    time: '14:30:00',
    timezoneOffset: 3,
    latitude: 50.4501,
    longitude: 30.5234,
    houseSystem: 'P',
  }),
});
const chart = await res.json();
console.log(chart.planets[0]); // Sun position

Python

import os, requests

r = requests.post(
    'https://api.astroway.info/v1/chart',
    headers={'X-Api-Key': os.environ['ASTROWAY_API_KEY'], 'Content-Type': 'application/json'},
    json={
        'date': '1990-07-14',
        'time': '14:30:00',
        'timezoneOffset': 3,
        'latitude': 50.4501,
        'longitude': 30.5234,
        'houseSystem': 'P',
    },
)
chart = r.json()
print(chart['planets'][0])

PHP

<?php
use GuzzleHttp\Client;

$aw = new Client(['base_uri' => 'https://api.astroway.info/v1/']);
$r = $aw->post('chart', [
    'headers' => ['X-Api-Key' => getenv('ASTROWAY_API_KEY')],
    'json' => [
        'date' => '1990-07-14',
        'time' => '14:30:00',
        'timezoneOffset' => 3,
        'latitude' => 50.4501,
        'longitude' => 30.5234,
        'houseSystem' => 'P',
    ],
]);
$chart = json_decode($r->getBody(), true);
print_r($chart['planets'][0]);

Example response

{
  "input": {
    "date": "1990-07-14",
    "time": "14:30:00",
    "timezoneOffset": 3,
    "latitude": 50.4501,
    "longitude": 30.5234,
    "houseSystem": "P"
  },
  "julianDay": 2448087.979166,
  "siderealTime": 8.234,
  "planets": [
    {
      "name": "Sun",
      "longitude": 111.87,
      "latitude": 0.0,
      "speed": 0.955,
      "sign": "cancer",
      "signIndex": 3,
      "house": 10,
      "retrograde": false
    },
    {
      "name": "Moon",
      "longitude": 87.23,
      "latitude": -4.2,
      "speed": 13.3,
      "sign": "gemini",
      "signIndex": 2,
      "house": 8,
      "retrograde": false
    }
  ],
  "houses": {
    "system": "P",
    "cusps": [12.34, 43.21, 72.56, 100.12, 130.45, 162.78, 192.34, 223.21, 252.56, 280.12, 310.45, 342.78],
    "ascendant": 12.34,
    "mc": 280.12
  },
  "aspects": [
    {
      "planet1": "Sun",
      "planet2": "Moon",
      "type": "sextile",
      "orb": 1.36,
      "applying": true
    }
  ],
  "chartSect": "diurnal"
}

Note

Response is abbreviated for clarity. The full response includes all 12 planets (Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto + North Node, Chiron), 12 house cusps, and all aspects between them.

House systems

Code	System	Notes
P	Placidus	Default, most popular
K	Koch	Popular in Germany
W	Whole Sign	Classical Hellenistic
E	Equal	Equal from ASC
R	Regiomontanus	Horary astrology
C	Campanus	Spatial system
T	Topocentric	Polich-Page
B	Alcabitius	Medieval tradition

Full list of 15 systems — in API reference.

Cosmogram (no birthplace)

If birth time is known but location isn’t, pass "cosmogram": true. Houses and ASC/MC are not calculated, cost is the same (20 credits).

Response headers

X-Credits-Used: 20
X-Credits-Remaining: 4980
X-Credits-Reset: 2026-05-01T00:00:00Z
X-Request-Id: 01HXY2A7ZM...

Next

• Synastry — compatibility of two charts
• Transits — transit overlay and event calendar
• Human Design — full HD chart
• Full API reference — all 705 endpoints