Composite Chart API that Reveals Your Relationship Personality

Composite chart calculation works like mathematical magic - it finds the exact midpoint between each planet in two birth charts to create a unified chart representing the relationship entity.

Think of it like averaging GPS coordinates: if person A's Venus is at 15° Aries and person B's Venus is at 15° Gemini, the composite Venus lands at 0° Taurus.

This process happens for all 10 planets plus key points, creating a complete birth chart for the relationship itself.

Our API automatically handles complex calculations like crossing zodiac boundaries, retrograde considerations, and house system variations.

The result is a relationship chart showing the partnership's personality, strengths, challenges, and evolutionary purpose.

While synastry analyzes how two individual charts interact ('your planets affect their chart'), composite charts create an entirely new entity representing the relationship itself.

It's like the difference between studying two separate people in conversation versus studying the conversation as its own living thing.

Synastry shows attraction patterns and compatibility; composite reveals the relationship's soul purpose, shared mission, and how the partnership will evolve over time.

Professional astrologers use both methods together - synastry for initial compatibility, composite for deeper relationship understanding.

Our API provides both analyses, but composite charts often reveal surprising insights about relationships that appear incompatible in synastry yet have deep spiritual connections.

Integrating composite chart analysis takes 3-6 hours for basic implementation.

Step 1: Collect birth data from both users (date, time, location required).

Step 2: Send paired user data to /composite endpoint with optional settings for house system and calculation method.

Step 3: Display relationship chart, aspects, interpretations, and timing guidance.

Advanced features include relationship phases, composite progressions, and solar returns for anniversary analysis.

Technical benefits include <300ms response time for real-time relationship analysis, complete JSON response with chart positions and human-readable interpretations, plus built-in visualization data for chart rendering.

Most platforms start with basic composite personality analysis then add premium features like relationship timing and evolutionary patterns.

Most astrology APIs offer basic planetary positions without interpretation.

We deliver complete relationship intelligence with professional composite analysis including 56+ calculations, house overlays, aspect patterns, and Arabic parts - all in one API call.

Speed advantage: what takes professional astrologers 2-4 hours of manual calculation, we deliver in <300ms.

Accuracy advantage: Swiss Ephemeris precision with support for 23 house systems and multiple calculation methods (standard midpoints, Davison method, progressive composite).

Business advantage: built specifically for developers with complete documentation, code examples, and relationship app integration guides.

Cultural advantage: supports Western, Vedic, and Hellenistic composite techniques for global markets.