5-Element Balance

POST

/bazi/element-balance

curl -X POST https://api.astroway.info/v1/bazi/element-balance \
  -H "X-Api-Key: aw_live_..." \
  -H "Content-Type: application/json" \
  -d '{ "date": "1990-05-15", "time": "14:30:00", "timezoneOffset": 8 }'

const res = await fetch('https://api.astroway.info/v1/bazi/element-balance', {
  method: 'POST',
  headers: {
    'X-Api-Key': process.env.ASTROWAY_API_KEY,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "date": "1990-05-15",
    "time": "14:30:00",
    "timezoneOffset": 8
  }),
});
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/bazi/element-balance',
    headers={'X-Api-Key': os.environ['ASTROWAY_API_KEY'], 'Content-Type': 'application/json'},
    json={
      'date': "1990-05-15",
      'time': "14:30:00",
      'timezoneOffset': 8
    },
)
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('bazi/element-balance', [
    'headers' => ['X-Api-Key' => getenv('ASTROWAY_API_KEY')],
    'json' => [
        'date' => '1990-05-15',
        'time' => '14:30:00',
        'timezoneOffset' => 8,
    ],
]);
$result = json_decode($r->getBody(), true);
if (!$result['ok']) throw new \RuntimeException($result['error']['message']);
print_r($result['data']);

Element balance across the whole chart. The balance object opens the branches and counts all eight characters three ways: visible, with every hidden stem, and weighted so the total stays at eight. The top-level elementCounts, dominantElement and missingElements are DEPRECATED (year and month only, four characters, branches unopened) and keep answering unchanged until 2027-09-08; the response carries RFC 8594 Deprecation and Sunset headers.

Authorizations

ApiKeyAuth

Parameters

Query Parameters

fields

string

Comma-separated dotted paths, relative to data, to keep in the response. A path is applied to every element of an array, so planets.name means the name of each planet. Paths that match nothing come back in _fields_unmatched; a list where nothing matches at all is a 400, because an empty object would be a confident wrong answer.

Example

planets.name,planets.longitude

precision

integer

<= 15

Round every non-integer number in the response to this many decimal places. Integers are left alone, because an id is not a measurement. Ecliptic longitudes ship with fourteen decimals by default; 2 is about a tenth of an arcminute.

Example

Request Body^required

application/json

object

date required

string

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

time

string

/^\d{2}:\d{2}(:\d{2})?$/

timezoneOffset

Ignored when timezone is sent.

number

>= -14 <= 14

timezone

IANA zone name such as Europe/Kyiv, or auto to look the zone up from latitude and longitude. The server takes the offset that zone kept at this local date and time, summer time included, and uses it in place of timezoneOffset. A clock time that happened twice takes the first occurrence; one skipped when clocks went forward takes the offset from before the change. Abbreviations such as EST are refused. Before 1970 the tz database is not reliable for every place, so send timezoneOffset when the local clock is known.

string

longitude

number

>= -180 <= 180

trueSolarTime

boolean

stageSchool

string

Allowed values: classical unified

includeFullTable

boolean

language

string

Example

{
  "date": "1990-05-15",
  "time": "14:30:00",
  "timezoneOffset": 8
}

Responses

200

Successful calculation

application/json

object

boolean

data

object

solarYear

number

nullable

pillars

Array<object>

nullable

object

name

string

nullable

stem

string

nullable

branch

string

nullable

pillar

string

nullable

elementCounts

object

Wood

number

nullable

Fire

number

nullable

Earth

number

nullable

Metal

number

nullable

Water

number

nullable

dominantElement

string

nullable

missingElements

Array<string>

nullable

balance

object

scope

string

nullable

visible

object

Wood

number

nullable

Fire

number

nullable

Earth

number

nullable

Metal

number

nullable

Water

number

nullable

withHiddenStems

object

Wood

number

nullable

Fire

number

nullable

Earth

number

nullable

Metal

number

nullable

Water

number

nullable

weighted

object

Wood

number

nullable

Fire

number

nullable

Earth

number

nullable

Metal

number

nullable

Water

number

nullable

weighting

string

nullable

dominantElement

string

nullable

dominantElementName

string

nullable

missingElements

Array

nullable

missingElementNames

Array

nullable

hiddenStems

Array<object>

nullable

object

pillar

string

nullable

branch

string

nullable

stems

Array<object>

nullable

object

stem

string

nullable

stemIndex

number

nullable

element

string

nullable

yin

boolean

nullable

role

string

nullable

weight

number

nullable

deprecations

Array<object>

nullable

object

fields

Array<string>

nullable

since

string

nullable

sunset

string

nullable

successor

string

nullable

reason

string

nullable

notes

Array

nullable

methodology

string

nullable

source

string

nullable

disclaimer

string

nullable

Example

{
  "ok": true,
  "data": {
    "solarYear": 1990,
    "pillars": [
      {
        "name": "year",
        "stem": "Geng",
        "branch": "Wu",
        "pillar": "Geng-Wu"
      },
      {
        "name": "month",
        "stem": "Xin",
        "branch": "Si",
        "pillar": "Xin-Si"
      },
      {
        "name": "day",
        "stem": "Geng",
        "branch": "Chen",
        "pillar": "Geng-Chen"
      },
      {
        "name": "hour",
        "stem": "Gui",
        "branch": "Wei",
        "pillar": "Gui-Wei"
      }
    ],
    "elementCounts": {
      "Wood": 0,
      "Fire": 2,
      "Earth": 0,
      "Metal": 2,
      "Water": 0
    },
    "dominantElement": "Fire",
    "missingElements": [
      "Wood",
      "Earth",
      "Water"
    ],
    "balance": {
      "scope": "eight characters",
      "visible": {
        "Wood": 0,
        "Fire": 2,
        "Earth": 2,
        "Metal": 3,
        "Water": 1
      },
      "withHiddenStems": {
        "Wood": 2,
        "Fire": 3,
        "Earth": 4,
        "Metal": 4,
        "Water": 2
      },
      "weighted": {
        "Wood": 0.4,
        "Fire": 1.6,
        "Earth": 1.6,
        "Metal": 3.3,
        "Water": 1.1
      },
      "weighting": "Each branch contributes one character split among the stems it shelters: 1.0 alone, 0.7/0.3 for two, 0.6/0.3/0.1 for three (本气/中气/余气). The membership is canonical; the split is a stated convention, and the day-count 人元司令 scheme distributes the same characters differently.",
      "dominantElement": "Metal",
      "dominantElementName": "Метал",
      "missingElements": [],
      "missingElementNames": [],
      "hiddenStems": [
        {
          "pillar": "year",
          "branch": "Wu",
          "stems": [
            {
              "stem": "Ding",
              "stemIndex": 3,
              "element": "Fire",
              "yin": true,
              "role": "principal",
              "weight": 0.7
            },
            {
              "stem": "Ji",
              "stemIndex": 5,
              "element": "Earth",
              "yin": true,
              "role": "middle",
              "weight": 0.3
            }
          ]
        },
        {
          "pillar": "month",
          "branch": "Si",
          "stems": [
            {
              "stem": "Bing",
              "stemIndex": 2,
              "element": "Fire",
              "yin": false,
              "role": "principal",
              "weight": 0.6
            },
            {
              "stem": "Geng",
              "stemIndex": 6,
              "element": "Metal",
              "yin": false,
              "role": "middle",
              "weight": 0.3
            },
            {
              "stem": "Wu",
              "stemIndex": 4,
              "element": "Earth",
              "yin": false,
              "role": "residual",
              "weight": 0.1
            }
          ]
        },
        {
          "pillar": "day",
          "branch": "Chen",
          "stems": [
            {
              "stem": "Wu",
              "stemIndex": 4,
              "element": "Earth",
              "yin": false,
              "role": "principal",
              "weight": 0.6
            },
            {
              "stem": "Yi",
              "stemIndex": 1,
              "element": "Wood",
              "yin": true,
              "role": "residual",
              "weight": 0.3
            },
            {
              "stem": "Gui",
              "stemIndex": 9,
              "element": "Water",
              "yin": true,
              "role": "middle",
              "weight": 0.1
            }
          ]
        },
        {
          "pillar": "hour",
          "branch": "Wei",
          "stems": [
            {
              "stem": "Ji",
              "stemIndex": 5,
              "element": "Earth",
              "yin": true,
              "role": "principal",
              "weight": 0.6
            },
            {
              "stem": "Ding",
              "stemIndex": 3,
              "element": "Fire",
              "yin": true,
              "role": "residual",
              "weight": 0.3
            },
            {
              "stem": "Yi",
              "stemIndex": 1,
              "element": "Wood",
              "yin": true,
              "role": "middle",
              "weight": 0.1
            }
          ]
        }
      ]
    },
    "deprecations": [
      {
        "fields": [
          "elementCounts",
          "dominantElement",
          "missingElements"
        ],
        "since": "2026-09-08",
        "sunset": "2027-09-08",
        "successor": "balance",
        "reason": "They count the year and month pillars only, four of the eight characters, and never open the branches, so an element sheltered as a hidden stem is reported absent. `balance` counts the whole chart. The old fields keep answering unchanged until the sunset date."
      }
    ],
    "notes": [],
    "methodology": "Under `balance`: all eight characters with the branches opened. `visible` counts the four stems plus each branch's principal hidden stem, the classic count of eight. `withHiddenStems` counts every sheltered stem whole. `weighted` splits each branch among the stems it shelters, so the total stays at eight. An element is called missing only when the weighted count reaches zero.",
    "source": "地支藏干 per 淵海子平 and 三命通會, public domain",
    "disclaimer": "BaZi pillars use the canonical 60-jiazi cycle, anchored at 1990-01-01 = Bing-Yin. Year and month boundaries are the exact Lichun and 節 instants from the ephemeris, stated in China Standard Time; pass time and timezoneOffset for births near a boundary. Day and hour follow the birthplace clock, with the day rolling at 23:00 local."
  }
}

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?

5-Element Balance

Authorizations

Parameters

Query Parameters

Example

Example

Request Body required

Example

Responses

200

Example

400

Example

401

Example

Request Body^required