Synastry

POST

/synastry

curl -X POST https://api.astroway.info/v1/synastry \
  -H "X-Api-Key: aw_live_..." \
  -H "Content-Type: application/json" \
  -d '{ "chart1": { "date": "1990-05-15", "time": "14:30:00", "timezoneOffset": 3, "latitude": 50.45, "longitude": 30.52 }, "chart2": { "date": "1985-11-03", "time": "08:15:00", "timezoneOffset": 2, "latitude": 48.46, "longitude": 35.04 } }'

const res = await fetch('https://api.astroway.info/v1/synastry', {
  method: 'POST',
  headers: {
    'X-Api-Key': process.env.ASTROWAY_API_KEY,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "chart1": {
      "date": "1990-05-15",
      "time": "14:30:00",
      "timezoneOffset": 3,
      "latitude": 50.45,
      "longitude": 30.52
    },
    "chart2": {
      "date": "1985-11-03",
      "time": "08:15:00",
      "timezoneOffset": 2,
      "latitude": 48.46,
      "longitude": 35.04
    }
  }),
});
const { ok, data, error } = await res.json();
if (!ok) throw new Error(error.message);
console.log(data);

import os, requests

r = requests.post(
    'https://api.astroway.info/v1/synastry',
    headers={'X-Api-Key': os.environ['ASTROWAY_API_KEY'], 'Content-Type': 'application/json'},
    json={
      'chart1': {
        'date': "1990-05-15",
        'time': "14:30:00",
        'timezoneOffset': 3,
        'latitude': 50.45,
        'longitude': 30.52
      },
      'chart2': {
        'date': "1985-11-03",
        'time': "08:15:00",
        'timezoneOffset': 2,
        'latitude': 48.46,
        'longitude': 35.04
      }
    },
)
result = r.json()
if not result['ok']:
    raise RuntimeError(result['error']['message'])
print(result['data'])

<?php
use GuzzleHttp\Client;

$client = new Client(['base_uri' => 'https://api.astroway.info/v1/']);
$r = $client->post('synastry', [
    'headers' => ['X-Api-Key' => getenv('ASTROWAY_API_KEY')],
    'json' => [
        'chart1' => [
            'date' => '1990-05-15',
            'time' => '14:30:00',
            'timezoneOffset' => 3,
            'latitude' => 50.45,
            'longitude' => 30.52,
        ],
        'chart2' => [
            'date' => '1985-11-03',
            'time' => '08:15:00',
            'timezoneOffset' => 2,
            'latitude' => 48.46,
            'longitude' => 35.04,
        ],
    ],
]);
$result = json_decode($r->getBody(), true);
if (!$result['ok']) throw new \RuntimeException($result['error']['message']);
print_r($result['data']);

Calculate cross-chart aspects between two natal charts for relationship analysis. Either partner may set timeUnknown: true: cross-aspects are still returned, while that partner’s houses, angles and sect come back null.

Authorizations

ApiKeyAuth

Request Body^required

application/json

Pair of natal charts where either birth time may be unknown. A chart with timeUnknown: true contributes planets and cross-aspects but no houses, angles or overlays.

object

chart1 required

Birth data where the clock time may be unknown. Either pass time (HH:mm:ss), or set timeUnknown: true and omit it. In the second case the response carries planets and aspects but no houses, angles or sect.

object

date required

string

/^\d{4}-\d{2}-\d{2}$/

time

string

/^\d{2}:\d{2}:\d{2}$/

timezoneOffset

Hours from UTC at the given moment, not minutes. Fractional zones are hours too: 5.5 for India, 5.75 for Nepal, -3.5 for Newfoundland. Defaults to 0, meaning UTC.

number

0 nullable >= -14 <= 14

latitude required

number

>= -90 <= 90

longitude required

number

>= -180 <= 180

houseSystem

string

default: P

name

string

city

string

zodiacType

string

Allowed values: tropical sidereal

ayanamsaId

number

nullable

ayanamsa

Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.

string

Allowed values: fagan-bradley lahiri de-luce raman krishnamurti kp yukteshwar jn-bhasin true-citra djwhal-khul

cosmogram

boolean

timeUnknown

boolean

key additional

nullable

chart2 required

object

date required

string

/^\d{4}-\d{2}-\d{2}$/

time

string

/^\d{2}:\d{2}:\d{2}$/

timezoneOffset

Hours from UTC at the given moment, not minutes. Fractional zones are hours too: 5.5 for India, 5.75 for Nepal, -3.5 for Newfoundland. Defaults to 0, meaning UTC.

number

0 nullable >= -14 <= 14

latitude required

number

>= -90 <= 90

longitude required

number

>= -180 <= 180

houseSystem

string

default: P

name

string

city

string

zodiacType

string

Allowed values: tropical sidereal

ayanamsaId

number

nullable

ayanamsa

Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.

string

Allowed values: fagan-bradley lahiri de-luce raman krishnamurti kp yukteshwar jn-bhasin true-citra djwhal-khul

cosmogram

boolean

timeUnknown

boolean

key additional

nullable

Example

{
  "chart1": {
    "date": "1990-05-15",
    "time": "14:30:00",
    "timezoneOffset": 3,
    "latitude": 50.45,
    "longitude": 30.52
  },
  "chart2": {
    "date": "1985-11-03",
    "time": "08:15:00",
    "timezoneOffset": 2,
    "latitude": 48.46,
    "longitude": 35.04
  }
}

Responses

200

Successful calculation

application/json

object

boolean

data

object

chart1

object

input

object

name

string

nullable

date

string

nullable

time

string

nullable

timezoneOffset

number

nullable

latitude

number

nullable

longitude

number

nullable

houseSystem

string

nullable

city

string

nullable

cosmogram

boolean

nullable

julianDay

number

nullable

siderealTime

number

nullable

planets

Array<object>

nullable

object

number

nullable

name

string

nullable

longitude

number

nullable

latitude

number

nullable

distance

number

nullable

speedLong

number

nullable

speedLat

number

nullable

speedDist

number

nullable

isRetrograde

boolean

nullable

declination

number

nullable

rightAscension

number

nullable

houses

object

system

string

nullable

cusps

Array<number>

nullable

ascendant

number

nullable

number

nullable

armc

number

nullable

vertex

number

nullable

equatorialAsc

number

nullable

coAscWK

number

nullable

coAscMunkasey

number

nullable

polarAsc

number

nullable

aspects

Array<object>

nullable

object

planet1

string

nullable

planet2

string

nullable

planet1Id

number

nullable

planet2Id

number

nullable

type

object

name

string

nullable

i18nKey

string

nullable

angle

number

nullable

orb

number

nullable

symbol

string

nullable

isMajor

boolean

nullable

color

string

nullable

exactAngle

number

nullable

orb

number

nullable

isApplying

boolean

nullable

houseAspects

Array<object>

nullable

object

planetName

string

nullable

planetId

number

nullable

houseIndex

number

nullable

cuspLongitude

number

nullable

type

object

name

string

nullable

i18nKey

string

nullable

angle

number

nullable

orb

number

nullable

symbol

string

nullable

isMajor

boolean

nullable

color

string

nullable

exactAngle

number

nullable

orb

number

nullable

isApplying

boolean

nullable

parallelAspects

Array<object>

nullable

object

planet1

string

nullable

planet2

string

nullable

planet1Id

number

nullable

planet2Id

number

nullable

type

string

nullable

exactDiff

number

nullable

orb

number

nullable

antiscia

Array<object>

nullable

object

planetId

number

nullable

planetName

string

nullable

antiscion

number

nullable

contraAntiscion

number

nullable

antisciaAspects

Array

nullable

chartSect

string

nullable

Example

{
  "ok": true,
  "data": {
    "chart1": {
      "input": {
        "name": "",
        "date": "1990-05-15",
        "time": "14:30:00",
        "timezoneOffset": 3,
        "latitude": 50.45,
        "longitude": 30.52,
        "houseSystem": "P",
        "city": "",
        "cosmogram": false
      },
      "julianDay": 2448026.9791666665,
      "siderealTime": 3.029043551629416,
      "planets": [
        {
          "id": 0,
          "name": "Sun",
          "longitude": 54.37601980167181,
          "latitude": -0.000020054940759470553,
          "distance": 1.0108955908980104,
          "speedLong": 0.9642248003676466,
          "speedLat": 0.00003805311526169511,
          "speedDist": 0.00022039347866615117,
          "isRetrograde": false,
          "declination": 18.867035147029778,
          "rightAscension": 52.00919841916813
        }
      ],
      "houses": {
        "system": "P",
        "cusps": [
          169.9679500481848
        ],
        "ascendant": 169.9679500481848,
        "mc": 77.07426201523143,
        "armc": 75.95565327444125,
        "vertex": 336.6271586045666,
        "equatorialAsc": 164.74875654391414,
        "coAscWK": 149.27468505332592,
        "coAscMunkasey": 168.73706704232438,
        "polarAsc": 329.2746850533259
      },
      "aspects": [
        {
          "planet1": "Sun",
          "planet2": "Moon",
          "planet1Id": 0,
          "planet2Id": 1,
          "type": {
            "name": "Trine",
            "i18nKey": "aspect_trine",
            "angle": 120,
            "orb": 12,
            "symbol": "△",
            "isMajor": true,
            "color": "#3366cc"
          },
          "exactAngle": 117.47133202515602,
          "orb": 2.5286679748439838,
          "isApplying": false
        }
      ],
      "houseAspects": [
        {
          "planetName": "Sun",
          "planetId": 0,
          "houseIndex": 0,
          "cuspLongitude": 169.9679500481848,
          "type": {
            "name": "Trine",
            "i18nKey": "aspect_trine",
            "angle": 120,
            "orb": 12,
            "symbol": "△",
            "isMajor": true,
            "color": "#3366cc"
          },
          "exactAngle": 115.59193024651299,
          "orb": 4.408069753487013,
          "isApplying": false
        }
      ],
      "parallelAspects": [
        {
          "planet1": "Moon",
          "planet2": "Saturn",
          "planet1Id": 1,
          "planet2Id": 6,
          "type": "parallel",
          "exactDiff": 0.9889902750346735,
          "orb": 0.9889902750346735
        }
      ],
      "antiscia": [
        {
          "planetId": 0,
          "planetName": "Sun",
          "antiscion": 125.62398019832818,
          "contraAntiscion": 305.6239801983282
        }
      ],
      "antisciaAspects": [],
      "chartSect": "diurnal",
      "meta": {
        "engineVersion": "2.10.03",
        "calculatedAt": "2026-08-23T22:24:02.486Z"
      }
    },
    "chart2": {
      "input": {
        "name": "",
        "date": "1985-11-03",
        "time": "08:15:00",
        "timezoneOffset": 2,
        "latitude": 48.46,
        "longitude": 35.04,
        "houseSystem": "P",
        "city": "",
        "cosmogram": false
      },
      "julianDay": 2446372.7604166665,
      "siderealTime": 9.08021654643949,
      "planets": [
        {
          "id": 0,
          "name": "Sun",
          "longitude": 220.77033612885523,
          "latitude": 0.00017390409589492878,
          "distance": 0.9919111684105741,
          "speedLong": 1.001466165031108,
          "speedLat": 0.00001657793612950324,
          "speedDist": -0.00024797941616784515,
          "isRetrograde": false,
          "declination": -15.058009781877828,
          "rightAscension": 218.34750425400088
        }
      ],
      "houses": {
        "system": "P",
        "cusps": [
          239.2194912194484
        ],
        "ascendant": 239.2194912194484,
        "mc": 170.4692673562458,
        "armc": 171.24324819659233,
        "vertex": 102.15081754955976,
        "equatorialAsc": 261.95619251649237,
        "coAscWK": 287.38103061998686,
        "coAscMunkasey": 243.52896760432273,
        "polarAsc": 107.38103061998683
      },
      "aspects": [
        {
          "planet1": "Sun",
          "planet2": "Moon",
          "planet1Id": 0,
          "planet2Id": 1,
          "type": {
            "name": "Trine",
            "i18nKey": "aspect_trine",
            "angle": 120,
            "orb": 12,
            "symbol": "△",
            "isMajor": true,
            "color": "#3366cc"
          },
          "exactAngle": 119.79213346849329,
          "orb": 0.20786653150670986,
          "isApplying": false
        }
      ],
      "houseAspects": [
        {
          "planetName": "Sun",
          "planetId": 0,
          "houseIndex": 2,
          "cuspLongitude": 311.9608523725515,
          "type": {
            "name": "Square",
            "i18nKey": "aspect_square",
            "angle": 90,
            "orb": 10,
            "symbol": "□",
            "isMajor": true,
            "color": "#cc3333"
          },
          "exactAngle": 91.1905162436963,
          "orb": 1.190516243696294,
          "isApplying": true
        }
      ],
      "parallelAspects": [
        {
          "planet1": "Sun",
          "planet2": "true Node",
          "planet1Id": 0,
          "planet2Id": 11,
          "type": "contra-parallel",
          "exactDiff": 0.5016816840850105,
          "orb": 0.5016816840850105
        }
      ],
      "antiscia": [
        {
          "planetId": 0,
          "planetName": "Sun",
          "antiscion": 319.2296638711448,
          "contraAntiscion": 139.22966387114477
        }
      ],
      "antisciaAspects": [],
      "chartSect": "diurnal",
      "meta": {
        "engineVersion": "2.10.03",
        "calculatedAt": "2026-08-23T22:24:02.486Z"
      }
    },
    "crossAspects": [
      {
        "planet1": "Sun",
        "planet1Id": 0,
        "planet2": "Saturn",
        "planet2Id": 6,
        "type": {
          "name": "Opposition",
          "i18nKey": "aspect_opposition",
          "angle": 180,
          "orb": 12,
          "symbol": "☍",
          "isMajor": true,
          "color": "#cc3333"
        },
        "exactAngle": 175.99902688473145,
        "orb": 4.00097311526855,
        "isApplying": true
      }
    ],
    "compatibility": {
      "score": 55,
      "label": "balanced",
      "harmony": 23.1,
      "tension": 18.7
    }
  }
}

400

Validation error

application/json

Example

{
  "ok": false,
  "error": {
    "code": "INVALID_INPUT",
    "message": "Validation failed: date: Date must be YYYY-MM-DD",
    "details": [
      {
        "path": "date",
        "message": "Date must be YYYY-MM-DD"
      }
    ]
  }
}

401

Missing or invalid API key

application/json

Example

{
  "ok": false,
  "error": {
    "code": "INVALID_API_KEY",
    "message": "Invalid API key"
  }
}

Корисно?

Match Score (dating compatibility)

Synastry

Authorizations

Request Body required

Example

Responses

200

Example

400

Example

401

Example

Request Body^required