Overview

AstroWay API is a professional backend for astrology calculations as a service.

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865 endpoints at arc-second precision, covering techniques no competitor offers: harmonics, draconic charts, CCG, Gauquelin sectors, full Human Design, rectification.

Who it’s for

1. Astrology app developers (web, mobile) who need precise and diverse calculations without maintaining their own computational infrastructure.
2. AI companies embedding astrology features: native MCP server for Claude, ChatGPT and other agents.
3. Professional astrologers building custom tools or client scripts.
4. Researchers who need programmatic access to calculations for statistical studies.
5. Content platforms adding astrology features on top of an existing product.

Who it’s not for

• Widget horoscopes (“Cancer today”) without backend control: AI interpretations and horoscopes exist (/interpret/*, /horoscope/*), but they’re designed as APIs for developers, not drop-in widgets.
• Street-level geocoding: location search turns a city or town name into coordinates and a time zone, but not an address. A chart takes latitude and longitude, and a 0,0 pair is refused rather than quietly charted for the Gulf of Guinea.
• A finished product: this is an API and fourteen embeddable widgets, not a chart editor, not an account area for your clients and not billing on your behalf.
• Free unlimited use: 10,000 credits a month covers a prototype and a small site, and past that it is a paid service.

What makes AstroWay unique

1. Rare techniques in API form

Technique	Why it matters
Harmonic charts (H2–H180)	Research astrology (John Addey method)
Draconic chart	Karmic / soul astrology
CCG (Cyclo-Carto-Graphy)	Progressed astrocartography - Jim Lewis premium technique
Gauquelin sectors	Statistical astrology, academic use
Tertiary progressions	Third type of progressions - niche but valued
Antiscia / contra-antiscia	Classical Hellenistic technique - traditional revival
Parallel aspects	Declination-based aspects - advanced practices
Rectification via API	Birth time correction - extremely high value
Planetary cycles (conjunctions)	Mundane astrology - world events
Barbault cyclic index	Mundane astrology
Algol minimum	Fixed star times - electional astrology
Local space lines	Feng shui-like directional astrology
Disposition chains	Rulership graphs - classical technique
Almuten figuris	Medieval technique - traditional revival

2. Arc-second precision, verified against NASA JPL Horizons

Every calculation runs on our own servers, with no upstream API, and is served as a REST API with no middleman markup. Precision:

• Planet positions: ±1 arcsecond vs NASA JPL ephemeris
• House cusps: ±1 arcminute
• Measured against Astrodienst swetest CGI (Astro.com): median 0.0013″, maximum 0.561″ (Chiron), see accuracy.

3. 865 endpoints: deep coverage of Western techniques

186 compute endpoints for Western astrology (4 Hellenistic schools, modern psychological, evolutionary, cosmobiology) + AI interpretations + full Human Design. Depth instead of spreading thin across dozens of directions.

Architecture

Your application
     ↓ HTTPS + X-Api-Key
api.astroway.info/v1/*
     ↓
AstroWay API
     ↓
Calculation and JSON response

• Calculations happen server-side: nothing to build or ship in your frontend.
• No server-side state: each request is self-contained. No client data leakage.
• API keys are bound to plan, rate limit, and daily credit balance. Monitoring via dashboard.

Next

• Quick start: first request in 5 minutes
• Authentication: how to get and store a key
• Credits & Rate Limits: how billing works
• API documentation: all endpoints with interactive playground