11 min read
How to Evaluate an Astrology API Before You Build On It
A 10-point checklist for evaluating astrology APIs covering accuracy, pricing, SDK support, MCP tools, and production readiness.
Blog
Insights, tutorials, and updates from the RoxyAPI team
Featured Posts
11 min read
API Uptime and Latency Transparency Report: Real Data
RoxyAPI measured 99.94% API uptime and 190ms p50 latency across 150,000+ requests. Full SLA transparency report with real latency percentiles.
All Posts
11 min read
Vimshottari Dasha Calculation: A Developer Guide
Learn the vimshottari dasha calculation algorithm, the 120-year planetary period system, and build dasha timelines with a working API.
9 min read
How to Verify Astrology Software Against NASA JPL
Learn to verify astrology accuracy using NASA JPL Horizons as ground truth. Step-by-step guide with tolerance thresholds, common errors, and automated testing.
9 min read
Tarot Data Model for Software: Cards, Spreads, Readings
How to design a tarot data model for applications. Covers card schemas, spread definitions, reading objects, database tables, and working API examples.
10 min read
Synastry Calculation for Developers: Comparing Two Charts
Learn how synastry calculation works, from inter-chart aspects and orb systems to composite charts. Build relationship compatibility features with a working API.
10 min read
Swiss Ephemeris AGPL Licensing for SaaS Developers
Swiss Ephemeris AGPL license requires SaaS apps to open source their entire codebase. Learn your options and AGPL-free alternatives for astrology APIs.
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.
12 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.
10 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.
10 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.
13 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.