The World's Most Complete Natal Chart API
Professional natal charts with planets, houses, aspects, and AI interpretations. Swiss Ephemeris precision. Hellenistic techniques. Under 300ms.
API Performance Metrics
Swiss Ephemeris precision meets enterprise-grade performance
Why Developers Choose AstroAPI
More features, faster performance, better price
Calculation Types
Response Time
AI Interpretations
House Systems
Languages
Price
Everything You Need for Professional Astrology
From raw astronomical calculations to AI-powered interpretations, our comprehensive API provides every tool professional astrologers and developers need.
Swiss Ephemeris Precision
23 House Systems
Traditional Techniques
AI-Powered Interpretations
Lightning Fast
Complete Fixed Stars
Lunar Calculations
Solar Returns & Progressions
Aspect Patterns
Relocation Charts
Data Validation
Batch Processing
Enterprise-Grade Technology Stack
Built on proven technologies for reliability, speed, and accuracy
Swiss Ephemeris Core
NASA JPL DE431 ephemeris data with milliarcsecond precision
AI Integration
GPT-5, Claude Sonnet, and custom LLMs for dynamic, personalized interpretations
Global CDN
Cloudflare edge network for sub-300ms responses worldwide
Security First
SOC 2 compliant, 256-bit encryption, GDPR ready
Get Started in Minutes, Not Months
15 Minutes
Time to first natal chart
113+ Examples
Working code samples
5 SDKs
Native language support
24/7 Support
Developer community
What is Natal Chart API? Complete Documentation
Natal Chart API calculates birth charts in <300ms with 56+ data points - 3x more than competitors
A natal chart API is a web service that calculates astrological birth charts programmatically. How it works: (1) Send birth data (date, time, location) via HTTP request, (2) API processes using Swiss Ephemeris (NASA JPL DE431), (3) Returns JSON with planetary positions, houses, aspects in <300ms. Unlike traditional APIs taking 2-3 seconds with 15-20 data points, AstroAPI delivers 56+ calculations instantly. Result: 2,847+ developers reduced response times by 10x while getting 3x more astrological data.
How accurate is Natal Chart API calculations?
Natal Chart API achieves 0.001-degree precision using Swiss Ephemeris with NASA JPL DE431 data.
Accuracy comparison: (1) AstroAPI: 0.001° precision, (2) Competitors: 0.1-1.0° precision, (3) Free tools: 1-5° precision.
This equals $500+ professional software accuracy but delivered via API in <300ms.
The Swiss Ephemeris (same engine used by Solar Fire and professional astronomers) ensures calculations match NASA astronomical data exactly.
What calculations does Natal Chart API provide?
Natal Chart API provides 68+ calculation types: (1) Planetary positions for 10 planets + nodes, (2) 23 house systems including Placidus, Whole Sign, Equal, (3) Major and minor aspects with orbs, (4) 97+ Arabic Parts/Hermetic Lots including hierarchical dependencies, (5) Fixed stars and asteroids, (6) Dignities and receptions, (7) Sect and bonification conditions.
Comparison: AstroAPI offers 68+ calculations while AstroSeek API provides 15, AstrologyAPI has 20, and Prokerala offers 18 calculations.
How does AI interpretation work in Natal Chart API?
AI interpretation process: (1) Chart data analyzed by custom-trained models, (2) Context evaluation using GPT-4 and Claude for aspect patterns, (3) Personalized text generation considering entire chart context, (4) Quality check ensuring accuracy and relevance.
Unlike competitors using static text snippets from 1990s books, our AI generates unique interpretations for each chart.
Result: 94% user satisfaction vs 67% for template-based systems.
How to integrate Natal Chart API into your application?
Integration takes 3 steps: (1) Get API key from dashboard (instant, no approval needed), (2) Make POST request with birth data to https://api.astrology-api.io/v1/natal-chart, (3) Receive JSON response in <300ms with all chart data.
Supported frameworks: React, Vue, Angular, Flutter, React Native, iOS/Swift, Android/Kotlin.
SDKs available for JavaScript, Python, PHP, Ruby, Java, C#.
Integration time: 15 minutes average vs 2-3 hours for competitors.
Use Cases
Mobile Apps
Power iOS and Android astrology apps with fast, accurate natal charts
Web Platforms
Add professional astrology features to your website or SaaS
Enterprise Solutions
Scale to millions of charts with our enterprise infrastructure
Dating Apps
Enhance matching with astrological compatibility analysis
Wellness Platforms
Integrate astrology into mental health and wellness apps
API Integrations
Connect astrology data to any platform via webhooks and APIs
Technical Specifications
| API Response Time | <300ms average, <500ms p99 (10x faster than competitors) |
| Calculation Precision | 0.001° with Swiss Ephemeris (NASA JPL DE431 data) |
| Supported House Systems | 23 systems: Placidus, Koch, Whole Sign, Equal, Campanus, + 18 more |
| Total Calculations | 68+ data points vs 15-20 from competitors |
| Arabic Parts/Lots | 97+ including Hermetic system (Fortune, Spirit, Eros, Victory) |
| Fixed Stars Database | 1,234 stars with positions, magnitudes, interpretations |
| Supported Languages | 9 languages: English, Spanish, French, German, Portuguese, Italian, Dutch, Polish, Russian |
| Rate Limits | Free: 100/hour, Starter: 500/hour, Pro: 2000/hour, Enterprise: unlimited |
| Response Formats | JSON (default), XML, CSV, PDF export available |
| Uptime Guarantee | 99.97% SLA (3 minutes downtime/month maximum) |
Why Choose AstroAPI for Natal Charts?
| Feature | AstroAPI | Others |
|---|---|---|
| Calculation Types | 56+ | 15-20 |
| Response Time | <300ms | 2-3s |
| House Systems | 23 | 3-5 |
| AI Interpretations | ✗ | |
| Arabic Parts | 97+ Hermetic | 0-10 basic |
| Fixed Stars | 1000+ | 0-50 |
| Hellenistic Techniques | ✗ | |
| Price | $11/mo | $49-199/mo |
Related Astrology APIs
Frequently Asked Questions about Natal Chart API
Everything developers need to know about our birth chart calculations
Related Astrology APIs
Enhance your natal chart calculations with our other professional astrology APIs. Add transit calculations for real-time predictions, synastry analysis for relationship compatibility, composite charts for relationship dynamics, solar returns for annual forecasts, horoscope generation for daily predictions.
Simple, Transparent Pricing
Start free, scale as you grow. No hidden fees, no surprises.
Starter
For small apps and personal projects
- All basic endpoints
- 12 house systems
- Email support
Professional
For growing astrology applications
- All enhanced endpoints
- 23 house systems
- AI interpretations
- Priority support
Business
For high-volume applications
- ALL endpoints
- White-label ready
- Phone support
All plans include comprehensive documentation and SDKs
Questions? Talk to our team