Astrology API Quick Start: TypeScript & Python in 5 Minutes

🕓 Recorded 2026-04-14, updated 2026-05-09. TS / Python / PHP SDKs are now live on public registries - @astroway/sdk (npm), astroway (PyPI), astroway/sdk (Packagist). Details in changelog.

You want to calculate a natal chart from code. Here’s the fastest path - under 5 minutes from nothing to working JSON.

Step 1: Get an API key (30 seconds)

In the dashboard, click “Create key” → “Production” → copy it. Keys look like aw_live_aB3xY7pQ9rN2mK4jH8vC5tL6wZ1fD0eR.

Tip: There are also aw_test_ sandbox keys that don’t consume credits. Use them for development.

Step 2: Install the SDK

TypeScript

npm install @astroway/sdk

Python

pip install astroway

Both SDKs cover all 777 endpoints with typed requests and responses.

Step 3: Your first natal chart

TypeScript

import { Astroway } from '@astroway/sdk';

const aw = new Astroway({
  apiKey: process.env.ASTROWAY_API_KEY!,
});

const chart = await aw.chart.compute({
  date: '1990-07-14',
  time: '14:30:00',
  timezoneOffset: 3,      // UTC+3 for Kyiv summer
  latitude: 50.4501,
  longitude: 30.5234,
  houseSystem: 'P',       // Placidus
});

const SIGNS = ['Aries', 'Taurus', 'Gemini', 'Cancer', 'Leo', 'Virgo',
               'Libra', 'Scorpio', 'Sagittarius', 'Capricorn', 'Aquarius', 'Pisces'];

const sun = chart.planets.find((p) => p.name === 'Sun')!;
console.log(`Sun: ${SIGNS[Math.floor(sun.longitude / 30)]} at ${sun.longitude.toFixed(2)}°`);
console.log(`ASC: ${chart.houses.ascendant.toFixed(2)}°`);
console.log(`Aspects: ${chart.aspects.length}`);

Run it:

ASTROWAY_API_KEY=aw_live_... npx tsx chart.ts

The file uses top-level await, so your package.json needs "type": "module". Without it tsx fails with Top-level await is currently not supported with the "cjs" output format.

Python

from astroway import Astroway, BirthData

aw = Astroway(api_key="aw_live_your_key_here")

chart = aw.chart.compute(BirthData(
    date="1990-07-14",
    time="14:30:00",
    timezone_offset=3,
    latitude=50.4501,
    longitude=30.5234,
    house_system="P",
))

SIGNS = ["Aries", "Taurus", "Gemini", "Cancer", "Leo", "Virgo",
         "Libra", "Scorpio", "Sagittarius", "Capricorn", "Aquarius", "Pisces"]

sun = next(p for p in chart["planets"] if p["name"] == "Sun")
print(f"Sun: {SIGNS[int(sun['longitude'] // 30)]} at {sun['longitude']:.2f}°")
print(f"ASC: {chart['houses']['ascendant']:.2f}°")
print(f"Aspects: {len(chart['aspects'])}")

Run it:

ASTROWAY_API_KEY=aw_live_... python3 chart.py

Understanding the response

You get back a JSON object with four main parts:

planets

Array of 13 objects. name carries the Swiss Ephemeris label for the body: Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, true Node (the North Node), mean Apogee (Lilith), Chiron.

{
  "id": 0,
  "name": "Sun",
  "longitude": 354.702,     // ecliptic longitude in degrees
  "latitude": -0.00016,
  "distance": 0.9945,       // in astronomical units
  "speedLong": 0.9971,      // degrees per day (negative = retrograde)
  "speedLat": 0.00003,
  "speedDist": 0.00019,
  "isRetrograde": false,
  "declination": -1.4159,
  "rightAscension": 355.437
}

Sign and house are not returned here: derive the sign as Math.floor(longitude / 30), and the house from the cusps in houses.

houses

House cusps (12 of them), plus ascendant and MC:

{
  "system": "P",
  "cusps": [118.18, 138.27, ...], // 12 values
  "ascendant": 118.18,
  "mc": 12.708,
  "armc": 11.69,
  "vertex": 253.97,
  "equatorialAsc": 100.75,
  "coAscWK": 81.13,
  "coAscMunkasey": 123.7,
  "polarAsc": 261.13
}

aspects

Array of aspects between planets:

{
  "planet1": "Sun",
  "planet2": "Mercury",
  "planet1Id": 0,
  "planet2Id": 2,
  "type": {                 // an object, not a string
    "name": "Conjunction",
    "i18nKey": "aspect_conjunction",
    "angle": 0,
    "orb": 12,
    "symbol": "☌",
    "isMajor": true,
    "color": "#660480"
  },
  "exactAngle": 3.365,
  "orb": 3.365,             // deviation from exact in degrees
  "isApplying": true
}

chartSect

"diurnal" (Sun above horizon at birth) or "nocturnal" (below). Used in classical astrology.

Next steps

What to try next:

Synastry: compatibility between two people:

const synastry = await client.synastry({
  chart1: { date: '1990-07-14', time: '14:30:00', timezoneOffset: 3, latitude: 50.45, longitude: 30.52 },
  chart2: { date: '1992-03-22', time: '09:15:00', timezoneOffset: 2, latitude: 48.85, longitude: 2.35 },
});
console.log(`Compatibility score: ${synastry.compatibility.score}/100`);

Current transits on a natal chart:

const transits = await client.transits({
  // birth data
  date: '1990-07-14', time: '14:30:00', timezoneOffset: 3,
  latitude: 50.4501, longitude: 30.5234,
  // transit date
  transitDate: '2026-04-14',
});

Daily horoscope generated from real transits:

const horoscope = await client.horoscopeDaily({
  date: '1990-07-14', time: '14:30:00', timezoneOffset: 3,
  latitude: 50.4501, longitude: 30.5234,
});
console.log(horoscope.text);

Full Human Design chart:

const hd = await client.humanDesign({
  date: '1990-07-14', time: '14:30:00', timezoneOffset: 3,
  latitude: 50.4501, longitude: 30.5234,
});
console.log(`${hd.type} - ${hd.strategy} - Profile ${hd.profile}`);

Credit costs

Natal chart (/chart): 20 credits
Synastry: 50 credits
Transits: 50 credits
Daily horoscope: 20 credits
Human Design: 50 credits

Free plan: 10,000 credits/month = 500 natal charts, or 200 synastries, or mixed workload.

Error handling

Every response includes credit headers:

X-Credits-Used: 20
X-Credits-Remaining: 4980
X-Credits-Reset: 2026-05-01T00:00:00Z

When credits run out you get 402 Payment Required. When rate limit hits (Free: 10 req/min), 429 Too Many Requests with Retry-After header.

SDK throws typed errors you can catch:

import { QuotaExceededError, RateLimitError } from '@astroway/sdk';

try {
  const chart = await aw.chart.compute(birth);
} catch (err) {
  if (err instanceof QuotaExceededError) {
    console.log('Upgrade plan or wait for reset');
  } else if (err instanceof RateLimitError) {
    console.log(`Retry in ${err.retryAfterSeconds ?? 60} seconds`);
  } else {
    throw err;
  }
}

Catch order runs from specific to general: they all extend ApiError, so testing for that first swallows the rest.

That’s it

You now have:

A working API key
SDK installed
First natal chart
Enough patterns to add synastry, transits, horoscopes

Next reading:

Full getting started guide: more detail
Example: Natal chart: deeper walkthrough
API reference: all 777 endpoints

MakSeong · AstroWay

I build the AstroWay API: Swiss Ephemeris on a clean REST surface, and I write about the dull parts that turn out to matter.

// build with this

Same Swiss Ephemeris as Solar Fire - but in 4 lines of code.

Free key, no card. 5,000 calls/month before you pay anything.

Get an API key → Read the docs

Astrology API Quick Start: TypeScript & Python in 5 Minutes

Step 1: Get an API key (30 seconds)

Step 2: Install the SDK

TypeScript

Python

Step 3: Your first natal chart

TypeScript

Python

Understanding the response

planets

houses

aspects

chartSect

Next steps

Credit costs

Error handling

That’s it

Same Swiss Ephemeris as Solar Fire - but in 4 lines of code.

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