Moon API

Calculate moon phase, illumination, lunar age and approximate moonrise/moonset.

GET/api/v1/moon

What It Does

Calculate moon phase, illumination, lunar age and approximate moonrise/moonset.

HTTP method: GET
Authentication: Public read-only; Bearer keys supported
Version: v1

Parameters

Name	Type	Required	Description
`city`	string	No	City lookup alternative to coordinates. Example: `Karachi`
`latitude`	number	No	Latitude. Example: `24.86`
`longitude`	number	No	Longitude. Example: `67.01`
`date`	date	No	Local date. Example: `2026-09-09`
`timezone`	string	No	Output timezone. Example: `Asia/Karachi`

Request Examples

cURL

curl -s 'https://worldclock.to/api/v1/moon?city=Karachi&latitude=24.86&longitude=67.01&date=2026-09-09&timezone=Asia/Karachi'

JavaScript

const response = await fetch("https:\/\/worldclock.to\/api\/v1\/moon?city=Karachi&latitude=24.86&longitude=67.01&date=2026-09-09&timezone=Asia\/Karachi");
const result = await response.json();
console.log(result.data);

PHP

$response = wp_remote_get('https://worldclock.to/api/v1/moon?city=Karachi&latitude=24.86&longitude=67.01&date=2026-09-09&timezone=Asia/Karachi');
 = json_decode(wp_remote_retrieve_body(), true);

Python

import requests

response = requests.get("https:\/\/worldclock.to\/api\/v1\/moon?city=Karachi&latitude=24.86&longitude=67.01&date=2026-09-09&timezone=Asia\/Karachi")
response.raise_for_status()
print(response.json()["data"])

Example Response

The values below illustrate the response shape. Live current-time fields are generated dynamically by the endpoint.

JSON

{
    "success": true,
    "data": {
        "date": "2026-09-09",
        "latitude": 24.8599999999999994315658113919198513031005859375,
        "longitude": 67.0100000000000051159076974727213382720947265625,
        "timezone": "Asia/Karachi",
        "phase": "Waning crescent",
        "phase_fraction": 0.9210000000000000408562073062057606875896453857421875,
        "illumination": 0.060999999999999998667732370449812151491641998291015625,
        "illumination_percent": 6.0999999999999996447286321199499070644378662109375,
        "lunar_age_days": 27.199999999999999289457264239899814128875732421875,
        "moonrise": "2026-09-09T04:19:00+05:00",
        "moonset": "2026-09-09T17:14:00+05:00"
    },
    "meta": {
        "version": "v1",
        "timezone": "Asia/Karachi",
        "timestamp": 1788946200
    }
}

Response Properties

Every successful response contains success: true, endpoint-specific data, and a meta object. The table below documents the public fields for this endpoint.

Property	Meaning
`success`	Boolean indicating whether the request completed successfully.
`meta.version`	Published API response version.
`meta.timestamp`	Unix timestamp for the API response instant.
`meta.timezone`	Timezone context used by the response.
`meta.rate_limit`	Per-client fair-use limit and remaining-request information on public transports.
`data.date`	Local calculation date.
`data.latitude`	Calculation latitude.
`data.longitude`	Calculation longitude.
`data.timezone`	Timezone used for output.
`data.phase`	Named lunar phase.
`data.phase_fraction`	Approximate cycle position from 0 to 1.
`data.illumination`	Approximate illuminated fraction from 0 to 1.
`data.illumination_percent`	Approximate illuminated percentage.
`data.lunar_age_days`	Approximate age in the current synodic month.
`data.moonrise`	Approximate timezone-aware moonrise datetime when calculable.
`data.moonset`	Approximate timezone-aware moonset datetime when calculable.

Errors use success: false with a stable machine-readable error code and a safe human-readable message.

Errors & HTTP Status Codes

400 — invalid or missing parameter.
401 — API key required or invalid when key-only access is enabled.
404 — unknown city, country or endpoint.
429 — configured rate limit reached.
503 — API disabled or maintenance mode.

Rate Limits & Caching

Current fair-use configuration is 60 requests per minute and 5000 requests per day. Cache stable directory/calculation responses where appropriate; treat current-time output as point-in-time data.