10 min read
Planetary Aspect Calculation for Developers: Orbs and Edge Cases
How to calculate planetary aspects correctly. Covers orb systems, the 360 degree wrap-around bug, applying vs separating detection, and a working API example.
Blog
Insights, tutorials, and updates from the RoxyAPI team
Recent Posts
11 min read
Placidus House Calculation for Developers: The Math
How Placidus house calculation works, the iterative algorithm behind house cusps, and why it breaks at extreme latitudes. Developer guide with working API example.
9 min read
Numerology Calculation Algorithms: Pythagorean vs Chaldean
How Pythagorean and Chaldean numerology calculations differ in letter mapping, digit reduction, and master number handling. A developer reference.
9 min read
Horoscope Generation for Developers: Transit Forecasts
How transit based horoscope generation works, from planetary positions to daily forecasts. Real API examples for developers building zodiac apps.
11 min read
Gun Milan Scoring Algorithm: How Kundli Matching Works
How the 36-point Gun Milan algorithm scores compatibility across 8 kootas. Covers Nadi dosha cancellation, Bhakoot exceptions, and API integration.
12 min read
How to Evaluate a Tarot API: Developer Checklist 2026
A 10-point checklist to evaluate tarot APIs on card coverage, spread support, reproducibility, AI readiness, and pricing before you commit.
11 min read
Birth Chart Calculation From Scratch: The Full Algorithm
Every step of a birth chart calculation explained for developers. From UTC conversion to aspect orbs, with a working API example.
9 min read
Ayanamsa Explained for Developers: Lahiri vs Raman vs KP
Ayanamsa is the offset between tropical and sidereal zodiacs. Learn how Lahiri, Raman, and KP systems differ and how to implement them in code.
15 min read
AI Agents Calling Real APIs: How Tool Calling and MCP Work in Practice
See how AI agents actually call APIs in production. Real examples of OpenAI function calling, Claude tool use, Gemini ADK, and MCP with request/response flows and code you can run today.
13 min read
AI Astrology API vs Calculation Infrastructure: The Real Cost
An AI astrology API sells its model, prompt and margin per reading. Structured chart data plus your own LLM costs less and keeps the reading yours.
13 min read
Real Cost of Multi-Domain Spiritual APIs: One Key vs Eighteen (2026)
Astrology API pricing comparison with real math. 18+ domains from $1.80 each vs $84 to $200 per month from separate providers. Flat rate beats wallet pricing.
12 min read
Daily Horoscope API with Unique Forecasts Per Sign [2026]
Most horoscope APIs return identical text for 11 of 12 signs. Learn how whole-sign house positions produce unique daily content per zodiac sign with transit metadata.
Featured Posts
13 min read
Best Tarot APIs for Developers 2026: Features and Pricing
Compare the best tarot APIs for developers: 78-card decks, spreads, seeded draws, card images, MCP, and flat pricing reviewed by RoxyAPI.
13 min read
Best Vedic Astrology API for Kundli and Panchang 2026
Compare RoxyAPI, AstrologyAPI, and Prokerala for kundli, panchang, dasha, and KP: fact-checked features, pricing, and real cost math.