Free Astro ApiAstrological Data for Developers
High-precision natal charts, transits, and synastry calculations for your next astrology app. Built for developers who demand accuracy and speed.
Global Accuracy
Calculations for any location on Earth with precise timezone handling.
Lightning Fast
Optimized C-based engine (Swiss Ephemeris) for millisecond response times.
Developer First
Clean REST API, comprehensive documentation, and 99.9% uptime SLA.
Vedic Mastery
Complete Sidereal system with 16 Varga charts, Dasha systems, and Panchang.
Built for Modern Developers
Pure JSON responses, typed schemas, and easy integration with any stack.
Native JSON API
Get clean, predictable JSON responses ready for your frontend. No parsing complex text or legacy formats.
Zero Config Integration
Works with React, Vue, Node.js, Python, or any HTTP-capable language. Just fetch and display.
Type-Safe Responses
Consistent data structures for planets, houses, and aspects make TypeScript integration a breeze.
{
"subject": {
"name": "Gabriel",
"city": "Paris"
},
"planets": [
{
"name": "Sun",
"sign": "Vir",
"pos": 12.7,
"house": 11
}
],
"aspects_summary": {
"total": 28,
"major": 28,
"by_type": {
"Conjunction": 12,
"Opposition": 5
}
}
}Planetary Positions
Precise calculations for all major bodies: Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.
- • Tropical Zodiac
- • Retrograde status
- • Precise Geocentric Positions
House Systems
Standardized calculations using the most popular house system for Western Astrology.
- • Placidus System (Default)
- • 12 Houses Calculation
- • Ascendant & Midheaven (via Cusps)
Aspects & Geometry
Detailed geometric relationships between planets for in-depth interpretation.
- • Major Aspects (Conjunction, Trine, Square, etc.)
- • Orbs calculation
- • Precise Angular Separation
Complete Vedic System
Authentic Sidereal calculations powered by the precise Swiss Ephemeris engine.
Explore Vedic Features
Divisional Charts
Go beyond the Rashi chart. We calculate all 16 Shodashvargas including:
- • D1 (Rashi) & D9 (Navamsha)
- • D10 (Dashamsha) for Career
- • D7 (Saptamsha) for Progeny
- • D60 (Shashtiamsha)
Predictive Systems
Time your events with precision using traditional predictive tools.
- • Vimshottari Dasha (3 Levels)
- • Panchang (Tithi, Nakshatra, Yoga)
- • Rahu Kalam & Yamaghanta
- • Sade Sati Analysis
Deep Analysis
Evaluate planetary strength and relationships instantly.
- • Shadbala (6-fold strength)
- • Ashtakavarga Points
- • Yogas (Manglik, Kala Sarpa, etc.)
- • Ashtakoota Compatibility
Professional Chinese BaZi
Advanced Four Pillars analysis with 12 Life Stages, Day Master strength, and precise solar time standards.
Explore BaZi Features
11 Symbolic Stars
Comprehensive Shen Sha detection including Nobleman, Academic Star, Travelling Horse, and the "Void" branches.
- • Tian Yi Nobleman
- • Wen Chang (Academic)
- • Yi Ma (Travelling Horse)
- • Solitary & Widow Stars
Deep Interactions
Professional-grade detection of internal dynamics including Harms, Breaks, and all 3 types of Punishments.
- • Branch Harms (Hai) & Breaks (Po)
- • 3-Penalty & Self-Punishments
- • Transformation Hints
- • Triple Harmonies (3-He)
Advanced Analysis
Go beyond the pillars with automated Day Master strength scoring and 12 Life Stages.
- • DM Strength & Structure (Ge Ju)
- • 12 Life Stages (Di Shi)
- • Useful God (Yong Shen) Detection
- • Annual & Monthly Flow Pillars
Frequently Asked Questions
Is this API free to use?
Yes! We offer a generous Free Tier that allows up to 80 requests per day forever. It's perfect for hobbyists, students, and testing.
What astrology system do you use?
We specialize in Western Astrology calculations using the Swiss Ephemeris (the gold standard in the industry) for maximum precision. We also support Vedic Astrology (Vargas, Dashas, Panchang) and Chinese Metaphysics (BaZi, 10 Gods, Luck Pillars).
Can I use this for commercial apps?
Absolutely. Our Entry and High tiers are designed for commercial production use with high rate limits and priority support.