Western Monthly Transits

30-day transit window vs natal chart. Returns day-by-day transit snapshots plus peak aspects (active 10+ days in the window). Use start_date to set the month start. Defaults to today.

Endpoint

POST /v1/western/transits/monthly

Request parameters

Field	Type	Required	Description
location	string \| null	No	City name to resolve to lat/lon/tz automatically. Example: 'Mumbai' or 'New Delhi, India'. If provided, latitude, longitude and timezone are not required.
name	string	No	Person name associated with the birth record
date	string	Yes	Birth date in YYYY-MM-DD format
time	string \| null	No	Birth time in HH:MM 24-hour format. If omitted, sunrise chart is used as fallback.
latitude	number \| null	No	Latitude. Required if location not provided.
longitude	number \| null	No	Longitude. Required if location not provided.
timezone	string \| null	No	IANA timezone. Required if location not provided.
ayanamsa	string	No	Sidereal ayanamsa mode used in calculations
start_date	string \| null	No	Transit reference date (YYYY-MM-DD): snapshot day for daily transits; window start for weekly (7 days) and monthly (30 days). Defaults to today.

Example request

curl
Python
TypeScript

curl -X POST "https://api.asterwise.com/v1/western/transits/monthly" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name":"Arjun Mehta","date":"1985-11-12","time":"06:45","latitude":19.076,"longitude":72.8777,"timezone":"Asia/Kolkata","start_date":"2026-01-01"}'

import asterwise
from asterwise.api.western_astrology_api import WesternAstrologyApi
from asterwise.models.western_transit_request import WesternTransitRequest

configuration = asterwise.Configuration(
    host="https://api.asterwise.com",
    access_token="YOUR_API_KEY",
)

request = WesternTransitRequest(
    name="Arjun Mehta",
    date="1985-11-12",
    time="06:45",
    latitude=19.076,
    longitude=72.8777,
    timezone="Asia/Kolkata",
    start_date="2026-01-01",
)

with asterwise.ApiClient(configuration) as client:
    api = WesternAstrologyApi(client)
    result = api.western_transits_monthly(western_transit_request=request)
    print(result)

import { createClient, createConfig, westernTransitsMonthly } from 'asterwise';

const client = createClient(createConfig({
  baseUrl: 'https://api.asterwise.com',
  headers: { Authorization: 'Bearer YOUR_API_KEY' },
}));

const result = await westernTransitsMonthly({
  client,
  body: {
      "name": "Arjun Mehta",
      "date": "1985-11-12",
      "time": "06:45",
      "latitude": 19.076,
      "longitude": 72.8777,
      "timezone": "Asia/Kolkata",
      "start_date": "2026-01-01"
  },
});

console.log(result.data);

Example response

{
  "success": true,
  "message": "success",
  "data": {
    "start_date": "2026-01-01",
    "end_date": "2026-01-30",
    "days": [
      {
        "date": "2026-01-01",
        "transit_planets": [
          {
            "name": "Sun",
            "longitude": 281.07802,
            "sign": "Capricorn",
            "sign_index": 9,
            "degree_in_sign": 11.07802,
            "is_retrograde": false,
            "aspects_to_natal": [
              {
                "transit_planet": "Sun",
                "natal_planet": "Moon",
                "type": "sextile",
                "exact_angle": 59.2397,
                "orb": 0.7603,
                "is_applying": true
              },
              {
                "transit_planet": "Sun",
                "natal_planet": "Mars",
                "type": "square",
                "exact_angle": 91.4256,
                "orb": 1.4256,
                "is_applying": false
              }
            ]
          },
          {
            "name": "Moon",
            "longitude": 74.225251,
            "sign": "Gemini",
            "sign_index": 2,
            "degree_in_sign": 14.225251,
            "is_retrograde": false,
            "aspects_to_natal": [
              {
                "transit_planet": "Moon",
                "natal_planet": "Mercury",
                "type": "opposition",
                "exact_angle": 177.9538,
                "orb": 2.0462,
                "is_applying": false
              },
              {
                "transit_planet": "Moon",
                "natal_planet": "Uranus",
                "type": "opposition",
                "exact_angle": 177.707,
                "orb": 2.293,
                "is_applying": false
              }
            ]
          },
          "... and 8 more items"
        ],
        "aspects": [
          {
            "transit_planet": "Sun",
            "natal_planet": "Moon",
            "type": "sextile",
            "exact_angle": 59.2397,
            "orb": 0.7603,
            "is_applying": true
          },
          {
            "transit_planet": "Sun",
            "natal_planet": "Mars",
            "type": "square",
            "exact_angle": 91.4256,
            "orb": 1.4256,
            "is_applying": false
          },
          "... and 16 more items"
        ],
        "total_aspects": 18
      },
      {
        "date": "2026-01-02",
        "transit_planets": [
          {
            "name": "Sun",
            "longitude": 282.096881,
            "sign": "Capricorn",
            "sign_index": 9,
            "degree_in_sign": 12.096881,
            "is_retrograde": false,
            "aspects_to_natal": [
              {
                "transit_planet": "Sun",
                "natal_planet": "Moon",
                "type": "sextile",
                "exact_angle": 60.2586,
                "orb": 0.2586,
                "is_applying": false
              },
              {
                "transit_planet": "Sun",
                "natal_planet": "Mercury",
                "type": "semisextile",
                "exact_angle": 29.9178,
                "orb": 0.0822,
                "is_applying": false
              },
              "... and 1 more item"
            ]
          },
          {
            "name": "Moon",
            "longitude": 89.27952,
            "sign": "Gemini",
            "sign_index": 2,
            "degree_in_sign": 29.27952,
            "is_retrograde": false,
            "aspects_to_natal": [
              {
                "transit_planet": "Moon",
                "natal_planet": "Saturn",
                "type": "quincunx",
                "exact_angle": 150.1239,
                "orb": 0.1239,
                "is_applying": false
              },
              {
                "transit_planet": "Moon",
                "natal_planet": "Neptune",
                "type": "opposition",
                "exact_angle": 177.4668,
                "orb": 2.5332,
                "is_applying": false
              }
            ]
          },
          "... and 8 more items"
        ],
        "aspects": [
          {
            "transit_planet": "Sun",
            "natal_planet": "Moon",
            "type": "sextile",
            "exact_angle": 60.2586,
            "orb": 0.2586,
            "is_applying": false
          },
          {
            "transit_planet": "Sun",
            "natal_planet": "Mercury",
            "type": "semisextile",
            "exact_angle": 29.9178,
            "orb": 0.0822,
            "is_applying": false
          },
          "... and 15 more items"
        ],
        "total_aspects": 17
      },
      "... and 28 more items"
    ],
    "peak_aspects": [
      {
        "transit_planet": "Jupiter",
        "natal_planet": "Sun",
        "type": "trine",
        "exact_angle": 122.0668,
        "orb": 2.0668,
        "is_applying": false
      },
      {
        "transit_planet": "Saturn",
        "natal_planet": "Moon",
        "type": "sesquiquadrate",
        "exact_angle": 135.9151,
        "orb": 0.9151,
        "is_applying": false
      },
      "... and 6 more items"
    ]
  }
}

Response fields

Field	Type	Description
success	boolean	True if the request succeeded
message	string	Human-readable status message
data	object
data.start_date	string
data.end_date	string
data.days	array[object]
data.days[].date	string
data.days[].transit_planets	array[object]
data.days[].transit_planets[].name	string
data.days[].transit_planets[].longitude	number
data.days[].transit_planets[].sign	string
data.days[].transit_planets[].sign_index	integer
data.days[].transit_planets[].degree_in_sign	number
data.days[].transit_planets[].is_retrograde	boolean
data.days[].transit_planets[].aspects_to_natal	array[object]
data.days[].transit_planets[].aspects_to_natal[].transit_planet	string
data.days[].transit_planets[].aspects_to_natal[].natal_planet	string
data.days[].transit_planets[].aspects_to_natal[].type	string
data.days[].transit_planets[].aspects_to_natal[].exact_angle	number
data.days[].transit_planets[].aspects_to_natal[].orb	number
data.days[].transit_planets[].aspects_to_natal[].is_applying	boolean
data.days[].aspects	array[object]
data.days[].aspects[].transit_planet	string
data.days[].aspects[].natal_planet	string
data.days[].aspects[].type	string
data.days[].aspects[].exact_angle	number
data.days[].aspects[].orb	number
data.days[].aspects[].is_applying	boolean
data.days[].total_aspects	integer
data.peak_aspects	array[object]
data.peak_aspects[].transit_planet	string
data.peak_aspects[].natal_planet	string
data.peak_aspects[].type	string
data.peak_aspects[].exact_angle	number
data.peak_aspects[].orb	number
data.peak_aspects[].is_applying	boolean

Errors

Code	Description	Reference
authentication_failed	Missing or invalid API key.	authentication_failed
ephemeris_unavailable	Upstream ephemeris service error.	ephemeris_unavailable
insufficient_tier	API key tier does not include this endpoint.	insufficient_tier
internal_error	Unexpected server error.	internal_error
ip_rate_limit_exceeded	Too many requests in a short window.	ip_rate_limit_exceeded
payload_too_large	Request body exceeds the size limit.	payload_too_large
resource_not_found	Referenced resource was not found.	resource_not_found
validation_error	Request body failed schema validation.	validation_error

Endpoint​

Request parameters​

Example request​

Example response​

Response fields​

Errors​

Related endpoints​