What is Compatibility API and how does it work?

Compatibility API calculates professional astrological relationship analysis by comparing two natal charts. It analyzes 20+ factors including planetary aspects, house overlays, Venus-Mars dynamics, and composite chart insights. You send birth data for two people and receive detailed compatibility scores, relationship insights, and practical guidance in under 180ms.

How do I integrate compatibility analysis with React or JavaScript?

Integration is straightforward with our RESTful API. Make a POST request with birth data for both people, receive JSON response with compatibility analysis. Code example: fetch('/api/compatibility', {method: 'POST', body: JSON.stringify({person1: birthData1, person2: birthData2})}). Response includes scores, aspects, and interpretations ready for your UI.

Which is the best compatibility API for dating apps?

Our Compatibility API is specifically designed for dating platforms. Unlike simple zodiac matching, we offer 0-100 compatibility scores, detailed relationship insights, and scalable performance (1000+ calculations/minute). Perfect for improving match quality, providing conversation starters, and increasing user engagement through meaningful astrological insights.

How accurate are astrological compatibility predictions?

Our calculations achieve 99.7% accuracy with Swiss Ephemeris data (NASA-grade precision). We analyze mathematical relationships between planetary positions, not vague personality descriptions. Compatibility insights reflect actual astrological dynamics - Venus-Mars harmony, Moon emotional compatibility, and synastry aspects that professional astrologers use.

How much does Compatibility API cost?

Compatibility API costs $37/month for 55,000 calculations (about $0.0007 each). Free tier includes 50 monthly calculations. This is 99%+ cheaper than professional compatibility readings ($150-500 each) and scales automatically. Enterprise plans available for high-volume dating platforms.

What compatibility factors do you analyze beyond sun signs?

We analyze 20+ compatibility factors: Venus-Mars romantic dynamics, Moon emotional compatibility, Mercury communication styles, house overlays (where partner planets fall into your life areas), major and minor aspects, composite chart midpoints, and relationship timing through progressions. Far beyond simple zodiac matching.

Can I customize compatibility scoring for my app?

Yes! Use API parameters to weight different compatibility factors. Emphasize romantic compatibility for dating apps, communication harmony for team building, or long-term potential for relationship coaching platforms. Customize scoring algorithms to match your app's specific focus and user needs.

Do you handle unknown birth times for compatibility?

Yes, we handle unknown birth times with solar charts (12:00 noon) and rectification techniques. While less precise than exact times, solar chart compatibility still delivers valuable insights about Sun-Moon dynamics, Venus-Mars compatibility, and basic personality interactions. Specify 'unknown' in birth time field.

How fast is compatibility calculation response time?

Average response time is <180ms for full compatibility analysis. This includes synastry calculations, aspect analysis, house overlays, and composite chart insights. Our Swiss Ephemeris calculations are optimized for speed without sacrificing accuracy, perfect for real-time dating app experiences.

What's the difference between synastry and composite analysis?

Synastry compares two individual charts (how your Venus relates to their Mars). Composite creates a single relationship chart using mathematical midpoints of both charts. Our API includes both: synastry for individual dynamics and composite for the relationship's unique energy and potential.

Can Compatibility API help with team building and business relationships?

Absolutely! Customize scoring weights for professional compatibility: Mercury aspects (communication), Saturn placements (work ethic), Mars dynamics (goal pursuit), and house overlays (role compatibility). Perfect for HR tools, team building platforms, and business relationship analysis.

How do you handle international birth data and timezones?

We automatically handle timezone conversions, daylight saving time, and historical calendar changes. Supports birth locations worldwide with precise latitude/longitude calculations. Swiss Ephemeris includes timezone database ensuring accurate planetary positions regardless of birthplace or era.

What aspects and orbs do you use for compatibility analysis?

We calculate 50+ aspects including major aspects (conjunction, trine, square, opposition, sextile) and minor aspects (quincunx, semisextile, etc.). Orbs vary by aspect type: 8° for conjunctions, 6° for trines/squares, 3° for minor aspects. Everything professionally calibrated for accurate relationship dynamics.

Is Compatibility API suitable for friendship matching?

Yes! Customize API parameters for platonic compatibility: emphasize Mercury (communication), Moon (emotional understanding), and Jupiter (shared values) over Venus-Mars romantic dynamics. Perfect for friendship apps, social networks, and community building platforms seeking deeper connection quality.

How does house overlay analysis work in compatibility?

House overlays show where your partner's planets fall into your life areas (houses). For example, their Venus in your 5th house brings romance and creativity to your self-expression. Our API calculates all planetary overlays with interpretations, revealing how partners mutually influence each other's life areas.

Can I get compatibility reports in multiple languages?

Currently English only, but we're expanding to Spanish, French, German, and Portuguese. The API returns structured data (scores, aspects, house positions) that's easy to translate. Raw astrological data is universal - aspects and planetary positions work in all languages.

What is your API rate limiting and reliability?

1000 requests per minute with burst allowance for peak usage. 99.9% uptime SLA with automatic failover. Comprehensive error handling and graceful degradation ensure your app stays responsive even during high-volume periods like Valentine's Day or launch campaigns.

How do you calculate composite charts for relationships?

Composite charts use mathematical midpoints between corresponding planets and points in both charts. For example, if one person has Sun at 10° Leo and partner has Sun at 20° Aquarius, composite Sun is at 15° Scorpio. We calculate all planetary midpoints with house system adjustments for complete relationship chart.

Relationship Analysis

Compatibility API That Actually Predicts Love

Professional compatibility API with synastry analysis, relationship scoring, and love matching using Swiss Ephemeris precision.

Perfect for dating apps, relationship platforms and astrology services.

View Demo

20+

Compatibility Factors

<180ms

Response Time

144

Zodiac Combinations

99.9%

Uptime SLA

2.3M+ compatibility calculations processed

Used by 847+ dating platforms worldwide

Swiss Ephemeris precision guaranteed

Manual synastry analysis takes 2-4 hours per couple
Simple sun sign matching ignores 90% of astrological factors
Professional compatibility consultations cost $150-500 per session
Most dating apps only use basic sun sign matching
No standardized compatibility scores for app integration
Relationship timing and progression analysis requires expertise

Transform with

Complete synastry analysis in <180ms with 20+ compatibility factors
Beyond sun signs: Venus, Mars, Moon, Ascendant and house overlays
Professional analysis for $0.004 per calculation
Standardized 0-100 compatibility scores for easy app integration
RESTful API with JSON responses for modern development
Includes timing, progression and relationship growth insights

Compatibility Analysis Performance

Professional relationship insights at scale

<180ms

API Response Time

20+

Compatibility Factors

99.7%

Accuracy Rate

144

Zodiac Combinations

50+

Synastry Aspects

2.3M+

Monthly Calculations

Complete Relationship Analysis Suite

Everything needed for professional compatibility scoring

Synastry Analysis

Compatibility Scoring

Aspect Analysis

Relationship Timing

What is Compatibility API? Complete Relationship Analysis Guide

Professional synastry analysis and love compatibility for modern applications

Compatibility API calculates professional astrological relationship analysis in under 180ms. Unlike simple zodiac matching that only looks at sun signs, our API analyzes 20+ compatibility factors including Venus-Mars dynamics, house overlays, synastry aspects, and composite chart insights. Perfect for dating apps, relationship platforms, and astrology services that need accurate, scalable compatibility calculations. With Swiss Ephemeris precision and standardized 0-100 scoring, it's like having a professional astrologer instantly analyze every relationship in your app.

How does astrological compatibility work?

Astrological compatibility goes far beyond sun sign matching.

Our API analyzes the mathematical relationships between two natal charts, looking at how planets interact across both charts.

Key factors include Venus (how you love) with Mars (how you pursue), Moon signs (emotional compatibility), Ascendants (first impressions), and house overlays (where your partner's energy falls into your life areas).

We calculate planetary aspects like conjunctions (unity), trines (harmony), squares (tension), and oppositions (polarity).

Each aspect is weighted by strength, orb (how close the angle is), and traditional astrological meaning.

The result is a comprehensive compatibility analysis showing relationship strengths, challenges, and growth opportunities.

20+ compatibility factors analyzed vs simple sun sign matching

1 min read

What makes our synastry analysis different?

Most compatibility tools only look at sun signs or maybe moon signs.

Our API performs complete synastry analysis like professional astrologers do, examining all planets, houses, and aspects between two charts.

We include composite chart calculations (mathematical midpoints that create the relationship's unique chart), house overlay analysis (where your partner's planets fall into your houses), and progressive timing (how the relationship evolves).

Our Swiss Ephemeris calculations ensure NASA-level precision for planetary positions.

The API returns detailed JSON with compatibility scores, aspect explanations, strength ratings, and practical relationship insights.

It's the difference between asking "are Libra and Scorpio compatible?" and getting a complete relationship roadmap.

Full synastry analysis with Swiss Ephemeris precision

1 min read

How to integrate compatibility analysis into your app?

Integration takes about 15 minutes with our RESTful API.

Send two sets of birth data (date, time, location) via POST request and receive comprehensive compatibility analysis as JSON.

Response includes overall compatibility score (0-100), category breakdowns (romantic, communication, long-term potential), detailed aspect analysis, and human-readable interpretations.

Perfect for dating apps wanting deeper matching, relationship platforms offering insights, or astrology services providing professional analysis.

Our API handles edge cases like unknown birth times, timezone conversions, and historical date calculations automatically.

Rate limiting prevents abuse while allowing high-volume applications to scale effectively.

15-minute integration with comprehensive JSON responses

1 min read

Why does mathematical precision matter for compatibility?

Astrological compatibility depends on exact planetary positions and angular relationships.

A Venus-Mars trine at 119° creates harmony, but at 125° it's no longer a trine - precision matters for accurate analysis.

Our Swiss Ephemeris calculations match professional astrology software to the arcsecond, ensuring consistent results.

Many compatibility apps use approximated planetary positions or ignore important factors like house systems, lunar nodes, and asteroid positions.

We calculate exact aspects with proper orbs, consider planetary strength by sign and house, and include modern factors like Chiron, North Node, and Part of Fortune.

This mathematical precision translates to compatibility insights that actually reflect relationship dynamics instead of generic descriptions.

Swiss Ephemeris precision for arcsecond accuracy

1 min read

Use Cases

Dating Applications

Deep compatibility matching beyond swipe-based preferences

Relationship Platforms

Professional insights for couples and relationship coaching

Team Building Tools

Workplace compatibility and team dynamics analysis

Social Networks

Friendship compatibility and community building features

Technical Specifications

API Response Time	<180ms average, <250ms p99
Compatibility Factors	20+ including aspects, houses, composites
Calculation Precision	Swiss Ephemeris arcsecond accuracy
Supported Aspects	50+ major and minor aspects with orbs
House Systems	Placidus, Koch, Equal House, Whole Sign
Score Range	0-100 standardized compatibility scores
Birth Time Handling	Unknown time rectification and solar charts
Historical Range	1800-2200 CE with full accuracy
Output Format	JSON with detailed breakdowns and explanations
Rate Limiting	1000 requests/minute with burst allowance
Error Handling	Comprehensive validation and graceful fallbacks
Composite Charts	Mathematical midpoint calculations included

Compatibility API vs Traditional Solutions

Feature	Astrology API	Others
Analysis Depth	20+ compatibility factors	Sun sign only
Calculation Time	<180ms response	2-4 hours manual
Professional Cost	$0.004 per calculation	$150-500 per reading
Precision Level	Swiss Ephemeris accuracy	Approximated positions
Integration Effort	15 minutes API setup	Weeks of development
Scalability	1000+ calculations/minute	One reading at a time
Consistency	Identical results every time	Varies by astrologer
Customization	Weighted factors via API	Fixed interpretation style

Related Astrology APIs

Synastry API

Detailed inter-chart aspect analysis and relationship dynamics

Composite API

Midpoint calculations for relationship chart creation

Transit API

Relationship timing and progressive aspect analysis

Natal API

Individual birth chart calculations for compatibility input

API Documentation

Full technical reference and code examples

Simple, Transparent Pricing

Start free, scale as you grow. No hidden fees, no surprises.

Always Free

Start Free

Perfect for learning, testing, and small personal projects

50 API calls/month

Basic natal charts

5 house systems

Community support

Pro

$11/month

For small apps and personal projects

All basic endpoints
12 house systems
Email support

Best Value

Pro Plus

$21/month

For growing apps and medium traffic

All enhanced endpoints
18 house systems
AI interpretations
Priority email support

Ultra

$37/month

For professional astrology applications

Credit math ↓

All premium endpoints
23 house systems
Advanced AI interpretations
Priority support

High Volume Plans

For enterprise-scale applications

Business

$99/month

For high-volume applications

Credit math ↓

ALL endpoints
White-label ready
Custom AI fine-tuning
Phone support

UNLIMITED

Enterprise

$399+per month

Unlimited requests with dedicated infrastructure

Dedicated server infrastructure
Sub-300ms guaranteed
24/7 dedicated support
99.99% uptime SLA

All plans include comprehensive documentation and SDKs

Questions? Talk to our team

Frequently Asked Questions About Compatibility API

Everything you need to know about compatibility analysis

Complete Your Astrology Stack

Compatibility API works best combined with our other tools. Add

detailed synastry analysis composite chart calculations transit timing analysis individual natal charts personalized predictions

Transform Your Platform with

Join 847+ platforms using our Compatibility API for deeper relationship insights. Boost match quality, user engagement, and satisfaction through real astrological analysis.

Start Free View Documentation

50 free monthly calculations

99.9% uptime SLA guarantee

Swiss Ephemeris precision

15-minute integration time

Compatibility API That Actually Predicts Love

Relationship Compatibility is Complex and Expensive

Instant Professional Compatibility Analysis

Compatibility Analysis Performance

Complete Relationship Analysis Suite

Synastry Analysis

Compatibility Scoring

Aspect Analysis

Relationship Timing

What is Compatibility API? Complete Relationship Analysis Guide

How does astrological compatibility work?

What makes our synastry analysis different?

How to integrate compatibility analysis into your app?

Why does mathematical precision matter for compatibility?

Use Cases

Dating Applications

Relationship Platforms

Team Building Tools

Social Networks

Technical Specifications

Compatibility API vs Traditional Solutions

Related Astrology APIs

Synastry API

Composite API

Transit API

Natal API

API Documentation

Simple, Transparent Pricing

Always Free

Pro

Pro Plus

Ultra

High Volume Plans

Business

Enterprise

Frequently Asked Questions About Compatibility API

What is Compatibility API and how does it work?

How do I integrate compatibility analysis with React or JavaScript?

Which is the best compatibility API for dating apps?

How accurate are astrological compatibility predictions?

How much does Compatibility API cost?

What compatibility factors do you analyze beyond sun signs?

Can I customize compatibility scoring for my app?

Do you handle unknown birth times for compatibility?

How fast is compatibility calculation response time?

What's the difference between synastry and composite analysis?

Can Compatibility API help with team building and business relationships?

How do you handle international birth data and timezones?

What aspects and orbs do you use for compatibility analysis?

Is Compatibility API suitable for friendship matching?

How does house overlay analysis work in compatibility?

Can I get compatibility reports in multiple languages?

What is your API rate limiting and reliability?

How do you calculate composite charts for relationships?

Complete Your Astrology Stack

Transform Your Platform with

Relationship Compatibility is Complex and Expensive

Instant Professional Compatibility Analysis

Compatibility Analysis Performance

Complete Relationship Analysis Suite

Synastry Analysis

Compatibility Scoring

Aspect Analysis

Relationship Timing

What is Compatibility API? Complete Relationship Analysis Guide

How does astrological compatibility work?

What makes our synastry analysis different?

How to integrate compatibility analysis into your app?

Why does mathematical precision matter for compatibility?

Use Cases

Dating Applications

Relationship Platforms

Team Building Tools

Social Networks

Technical Specifications

Compatibility API vs Traditional Solutions

Related Astrology APIs

Synastry API

Composite API

Transit API