· 10 min read
Free Astrology API: Fine to Prototype, Risky to Ship
A free astrology API key suits a weekend prototype. Daily caps, solo operators and AGPL licences on GitHub code make it a risk under a paying app.
T
Torsten Brinkmann
Astrologer & Developer Advocate
Germany49 articles published
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
Articles by Torsten Brinkmann
· 12 min read
Astrology API Market Leader: How to Verify the Claim
No spiritual data API publishes audited customer counts, so market leader stays unprovable. Here is how to judge an astrology API on evidence you can check.
· 9 min read
Astrology App Development Cost: What You Pay Every Month
Astrology app development cost has a build and a monthly bill. The monthly bill follows personal requests per user, not audience size. Worked math inside.
· 11 min read
Deterministic Horoscope Engine vs LLM: Why We Built Our Own
Why RoxyAPI writes horoscopes with a deterministic engine, not an LLM: the same date returns the same text, and every date is checkable in events[].
· 13 min read
Arc Second Accuracy: How to Read an Astrology API Claim
Arc second accuracy claims compare only with lineage, scope, sample, worst case and a public runner beside them. Five questions for any astrology API.
· 15 min read
Best Horoscope API for Developers Shipping Feeds 2026
Best horoscope API for developers: dated transit events, fact-checkable columns, natively composed languages, 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
Horoscope Embed Code: Preview and Style Every Widget First
Horoscope embed code for any website. Preview, theme and translate every astrology, tarot and Vedic widget with no account, then go live on one plan.
· 10 min read
Composite Chart vs Synastry Chart: The Midpoint Method
Composite chart vs synastry chart: synastry compares two intact charts, a composite builds one new chart from their midpoints. Method and API inside.