Synastry API: AI-Powered Compatibility Analysis in Under 300ms
The Synastry API works best combined with our other tools. Add
Built for scale, optimized for speed
From basic aspects to AI-driven relationship intelligence
Everything developers need to add professional compatibility analysis
The Synastry API analyzes relationship compatibility like GPS handles navigation - it shows you the route AND the obstacles. Instead of basic matches like 'Leo matches Sagittarius,' it calculates 47+ planetary interactions between two birth charts in under 300ms. For dating app developers, that means upgrading from 'you both like hiking' to 'strong Venus-Mars connection suggests instant attraction, but Saturn aspects mean this relationship needs commitment to thrive.'
The Synastry API analyzes relationship compatibility like GPS handles navigation - it shows you the route AND the obstacles.
Instead of basic matches like 'Leo matches Sagittarius,' it calculates 47+ planetary interactions between two birth charts in under 300ms.
Think of it this way: if individual birth charts are personality profiles, synastry reveals how those personalities interact.
Where's the chemistry? Where are conflicts? Our API processes inter-chart aspects, house overlays, and composite charts.
Basic astrology compatibility is like judging a movie by its poster.
Professional synastry analyzes the entire 'film' - plot, character development, and how everything connects.
Most dating apps use sun sign compatibility: 'Fire signs match air signs.' That's one data point of hundreds possible.
Professional synastry examines 10+ relationship dimensions including emotional connection, communication style, physical chemistry, and long-term potential.
Integrating synastry analysis takes about 4 hours for basic implementation, 2-3 days for advanced features.
Step 1: Collect birth data - date (required), time (preferred), location (required).
About 70% of users provide birth time when you explain it improves matches.
Step 2: API integration - send two user profiles to the /synastry endpoint, receive compatibility breakdown in JSON.
Step 3: Display options - show compatibility percentages, detailed reports, or conversation starters.
Most astrology APIs deliver raw data and expect developers to figure out interpretation.
We deliver the 'so what?' that users actually want.
Depth comparison: competitors offer basic planetary positions.
We deliver complete relationship intelligence - aspects, house overlays, composite charts plus explanations in plain language.
Speed advantage: manual synastry analysis takes professional astrologers 2-3 hours.
We deliver comprehensive relationship insights in a single 300ms API call.
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| API Response Time | <300ms average, 150ms for basic compatibility |
| Compatibility Dimensions | 10+ areas analyzed (emotional, communication, physical, spiritual) |
| Planetary Interactions | 47+ inter-chart aspects calculated per analysis |
| House Overlays | 12 house overlay interpretations included |
| Composite Charts | Complete composite chart analysis and interpretation |
| Cultural Support | Western, Vedic, and Chinese astrology traditions |
| Relationship Types | Romantic, friendship, business, family dynamics |
| Required Birth Data | Date, time (preferred), location with timezone handling |
| Feature | Astrology API | Others |
|---|---|---|
| Response Time | <300ms complete analysis | Manual calculation or multiple API calls |
| Analysis Depth | 47+ planetary interactions | 5-10 basic aspects |
| Interpretation | Relationship insights in plain language | Raw astrological data only |
| Relationship Types | Romantic, friendship, business, family | Generic compatibility only |
| Cultural Support | Western, Vedic, Chinese traditions | Western astrology only |
| Price | $37/month for 55K analyses | $99-299/month for basic features |
Individual birth chart analysis before relationship compatibility
Analyze the relationship itself as a unique entity
Timing guidance for relationship developments and phases
Simplified compatibility analysis for basic matching features
Complete technical reference for all endpoints
Start free, scale as you grow. No hidden fees, no surprises.
For small apps and personal projects
For growing apps and medium traffic
For enterprise-scale applications
All plans include comprehensive documentation and SDKs
Questions? Talk to our team
Real answers to real questions - no corporate BS