14 min read·
Astrology API Accuracy: How to Read an Arcsecond Claim
Two astrology APIs can both claim arcsecond accuracy against NASA JPL. Five questions decide whether their published medians are comparable at all.
Torsten Brinkmann
Astrologer & Developer Advocate
Germany
Torsten Brinkmann combines 16 years of Western astrology practice with a software engineering background, specializing in astrological calculation tools, birth chart APIs, and planetary aspect analysis. His Computer Science training shapes writing that addresses both the astronomical mathematics behind natal charts and the developer integration patterns for astrology APIs. He is currently writing a technical guide to birth chart calculation for developers.
Computer Science background16 years of practiceWriting a technical astrology guide
Western astrologyBirth chart analysisPlanetary aspectsSynastryForecastTransit forecastingHuman DesignBodygraph analysisAPI integrationAstrology software
57 articles published
Articles by Torsten Brinkmann
15 min read·
Best Horoscope API for Developers Shipping Feeds 2026
Best horoscope API for developers: dated transit events, fact-checkable columns, every language the API ships, and a white-label license. By RoxyAPI.
14 min read·
Composite Chart Houses: Why Two Calculators Disagree
Composite chart houses come from two recognised methods, midpoint and reference place, and they return different angles. How to tell which one a tool used.
13 min read·
Astrology API Data Residency: A GDPR Buyer Checklist
Birth date, time and place are personal data. Eleven checks that tell you where an astrology API actually sends it, and how to verify each one yourself.
10 min read·
Audit an Astrology API: Count What It Actually Ships
An endpoint count on a pricing page is a claim. Three commands against a live OpenAPI spec turn it into a measurement you can check yourself.
10 min read·
Why Astrology APIs Feel Unreliable (And How to Choose Better)
Astrology APIs feel unreliable for concrete reasons: drifting specs, unverified math, and credit-weighted bills. Here is how to choose one that holds up.
10 min read·
Composite Chart API: The Midpoint Relationship Method
A composite chart is not synastry. It merges two natal charts into one midpoint chart for the relationship. See the method and the composite chart API.
11 min read·
Annual Profections API: Find Your Lord of the Year
Calculate annual profections and the lord of the year from any birth chart with one API call. See the formula, real response, and no-code widget.
10 min read·
Astrocartography API: Planetary Lines for Relocation
Build relocation astrology with the astrocartography API: MC, IC, Ascendant, and Descendant planetary lines from one birth moment, ready to map.
13 min read·
Build Your Own Astrology Website: Free Bookable Template
A free MIT template for astrologers, tarot readers and numerologists. Real birth charts, tarot, human design, booking and a blog. You own the code.
12 min read·
Fixed Stars, Asteroids, and Arabic Lots: Advanced Natal API
Fixed stars, asteroids, Arabic lots, aspect patterns, progressions, solar arc, and profections. Seven advanced natal endpoints, real responses, one key.
11 min read·
Astrology Widget for WordPress: Official RoxyAPI Plugin
Add astrology widgets to WordPress with the official RoxyAPI plugin: install from WordPress.org, add your key, and drop shortcodes. No code required.
Page 1 of 5