---
title: "Natal chart (public, no key)"
method: POST
path: "/public/chart"
tags: ["Public"]
---

# Natal chart (public, no key)

`POST /public/chart`

Full natal chart: planets, houses, aspects, angles. Same input and same engine as the authed POST /chart, served anonymously under the public rate limit. Responses carry the free-tier `_footer` watermark. Field names are strict: `latitude`, `longitude`, `timezoneOffset`, not `lat` / `lng` / `tz`.

## Request body

- ChartInput — Birth data for a single natal chart. Required: date (YYYY-MM-DD), time (HH:mm:ss), latitude and longitude in decimal degrees. The short forms lat, lon, lng and tz are rejected with 400 INVALID_FIELD; pass the full names. timezoneOffset is hours from UTC and defaults to 0, meaning UTC. city is a display label only: nothing here geocodes it, so it never stands in for coordinates.
  - `date` string, required
  - `time` string, required
  - `timezoneOffset` number, nullable — 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.
  - `latitude` number, required
  - `longitude` number, required
  - `houseSystem` string
  - `name` string
  - `city` string
  - `zodiacType` 'tropical' | 'sidereal'
  - `ayanamsaId` number, nullable
  - `ayanamsa` 'fagan-bradley' | 'lahiri' | 'de-luce' | 'raman' | 'krishnamurti' | 'kp' | 'yukteshwar' | 'jn-bhasin' | 'true-citra' | 'djwhal-khul' — Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.
  - `cosmogram` boolean

## Response `200`

OK

- object
  - `ok` boolean
  - `data` object
    - `input` object, nullable
      - `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` object[], nullable
      - `id` 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, nullable
      - `system` string, nullable
      - `cusps` number[], nullable
      - `ascendant` number, nullable
      - `mc` number, nullable
      - `armc` number, nullable
      - `vertex` number, nullable
      - `equatorialAsc` number, nullable
      - `coAscWK` number, nullable
      - `coAscMunkasey` number, nullable
      - `polarAsc` number, nullable
    - `aspects` object[], nullable
      - `planet1` string, nullable
      - `planet2` string, nullable
      - `planet1Id` number, nullable
      - `planet2Id` number, nullable
      - `type` object, nullable
        - `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` object[], nullable
      - `planetName` string, nullable
      - `planetId` number, nullable
      - `houseIndex` number, nullable
      - `cuspLongitude` number, nullable
      - `type` object, nullable
        - `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` object[], nullable
      - `planet1` string, nullable
      - `planet2` string, nullable
      - `planet1Id` number, nullable
      - `planet2Id` number, nullable
      - `type` string, nullable
      - `exactDiff` number, nullable
      - `orb` number, nullable
    - `antiscia` object[], nullable
      - `planetId` number, nullable
      - `planetName` string, nullable
      - `antiscion` number, nullable
      - `contraAntiscion` number, nullable
    - `antisciaAspects` object[], nullable
      - `planet1` string, nullable
      - `planet1Id` number, nullable
      - `planet2` string, nullable
      - `planet2Id` number, nullable
      - `type` string, nullable
      - `orb` number, nullable
    - `chartSect` string, nullable
    - `meta` object, nullable
      - `engineVersion` string, nullable
      - `calculatedAt` string, nullable
  - `_footer` string — Free-tier watermark, present on every public response.

## Other responses

- `400` — Invalid input

---

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