# AstroCodex

> Professional AI astrology platform offering both Vedic (sidereal Lahiri) and Western (tropical Placidus) chart calculation, AI-powered natal interpretation, daily moon calendar, retrograde tracker, transit forecasts, synastry compatibility, and an interactive AI astrologer chat — all powered by Swiss Ephemeris and modern LLMs.

Two domains, same product, different default language: **astrocodex.ai** (English-first, all 30+ languages available) and **astrocodex.ru** (Russian-first). Every public page exists on both domains; hreflang links connect them.

The product covers two astrological systems side-by-side rather than picking one — Western tropical for users in Europe / Americas, Vedic sidereal (Lahiri ayanamsha) for users familiar with Jyotish. Calculations come from a dedicated Swiss Ephemeris service; AI interpretations are grounded in the user's actual chart data, not hallucinated.

## Core entry points

- [Home](https://astrocodex.ai/): platform overview with live AI astrologer demo
- [AI Birth Chart](https://astrocodex.ai/ai-birth-chart): free natal chart calculation with AI-written interpretation
- [Birth Chart Calculator](https://astrocodex.ai/birth-chart-calculator): pure calculator, Western or Vedic, no interpretation
- [AI Astrologer](https://astrocodex.ai/ai-astrologer): chat with an AI grounded in your chart, asks any question
- [Pricing](https://astrocodex.ai/pricing): Free + Standard + Pro + Pro+ tiers
- [Telegram Bot](https://astrocodex.ai/telegram-bot): full product as a Telegram Mini App

## Calculators (free, no signup)

- [Rising Sign Calculator](https://astrocodex.ai/rising-sign-calculator): ascendant in seconds, Western and Vedic
- [Moon Sign Calculator](https://astrocodex.ai/moon-sign-calculator): moon placement, sidereal + tropical
- [Transits Calculator](https://astrocodex.ai/transits-calculator): current planetary transits to your natal chart
- [Saturn Return](https://astrocodex.ai/saturn-return): exact Saturn return dates
- [Zodiac Compatibility](https://astrocodex.ai/zodiac-compatibility): synastry between two charts (Ashtakuta + Western aspects)
- [Kundali](https://astrocodex.ai/kundali): Vedic birth chart with planetary positions, nakshatras, dashas, yogas
- [Kundali Chart](https://astrocodex.ai/kundali-chart): North + South Indian Kundali styles

## Calendars and forecasts

- [Moon Calendar](https://astrocodex.ai/moon-calendar): real-time moon phase, sign, void-of-course, lunar day. Per-day pages from 1991 to 2099 in both Western and Vedic systems
- [Moon Phase Calendar 2026](https://astrocodex.ai/moon-phase-calendar-2026): full lunar phase calendar for 2026 with eclipses
- [Retrograde Calendar](https://astrocodex.ai/retrograde): retrograde periods for Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, Chiron — 1980 to 2099
- [Mercury Retrograde 2026](https://astrocodex.ai/mercury-retrograde-2026): all 2026 Mercury retrograde dates with per-sign effects
- [Horoscope 2026](https://astrocodex.ai/horoscope-2026): yearly forecast per zodiac sign

## Vedic (Jyotish) reference

Sidereal Lahiri ayanamsha. Whole-Sign houses by default.

- [Rashi](https://astrocodex.ai/vedic/rashi): the 12 Vedic signs
- [Planets (Graha)](https://astrocodex.ai/vedic/planets): the 9 graha incl. Rahu / Ketu
- [Houses (Bhava)](https://astrocodex.ai/vedic/houses): 12 bhava and their indications
- [Nakshatras](https://astrocodex.ai/vedic/nakshatras): all 27 lunar mansions, deities, padas
- [Dashas](https://astrocodex.ai/vedic/dashas): Vimshottari maha + antardasha periods
- [Yogas](https://astrocodex.ai/vedic/yogas): Raja Yogas, Dhana Yogas, Pancha Mahapurusha and 100+ classical combinations
- [Divisional Charts (Vargas)](https://astrocodex.ai/vedic/divisional): D1 Rasi through D60 Shashtiamsha
- [Remedies](https://astrocodex.ai/vedic/remedies): mantras, gemstones, yantras, charity
- [Muhurta](https://astrocodex.ai/vedic/muhurta): electional astrology — auspicious time selection
- [Vedic Transits (Gochar)](https://astrocodex.ai/vedic/transits): Sade Sati, Jupiter gochar, Rahu/Ketu transits, Ashtakavarga transit strength, read from the natal Moon
- [Doshas](https://astrocodex.ai/vedic/doshas): Mangal (Manglik), Kaal Sarp, Pitra, Kemadruma, Guru Chandal — causes, severity, cancellation (bhanga), remedies
- [Vedic Synastry](https://astrocodex.ai/vedic/synastry): Ashtakuta 36-point compatibility, mangal dosha

## Western (tropical) reference

Tropical zodiac. Placidus houses by default.

- [Signs](https://astrocodex.ai/western/signs): 12 tropical signs
- [Planets](https://astrocodex.ai/western/planets): Sun through Pluto + Chiron
- [Houses](https://astrocodex.ai/western/houses): 12 Placidus houses
- [Aspects](https://astrocodex.ai/western/aspects): Ptolemaic + minor aspects, orbs, harmonics
- [Essential Dignities](https://astrocodex.ai/western/dignities): domicile, exaltation, detriment, fall, triplicity, terms, faces; almuten, mutual reception, sect
- [Transits](https://astrocodex.ai/western/transits): transiting Jupiter–Pluto and Chiron over the natal chart; orbs, applying/separating, retrograde stations, Saturn/Chiron returns
- [Elements](https://astrocodex.ai/western/elements): fire, earth, air, water
- [Qualities](https://astrocodex.ai/western/qualities): cardinal, fixed, mutable
- [Western Synastry](https://astrocodex.ai/western/synastry): cross-aspects, house overlays, composite, Davison
- [Progressions](https://astrocodex.ai/western/progressions): secondary progressions, progressed Moon timing
- [Solar Return](https://astrocodex.ai/western/solar-return): personal year chart

## Astrology techniques

- [All techniques](https://astrocodex.ai/techniques): hub indexing all 222 per-technique pages across Vedic, Western, Jaimini, Hellenistic, Tajaka and KP
- Each technique has its own page at `/technique/{slug}` (e.g. `/technique/karma-v-atmakaraka`, `/technique/love-v-ashtakuta`) — what it is, how it's computed, classical sources, and how the AI reads it from your chart

## For developers

- [Developer API & MCP guide](https://astrocodex.ai/api-guide): hub for the two API surfaces (Account + Engine) over REST and MCP
- [Account API](https://astrocodex.ai/api-guide/account-api) / [Account MCP](https://astrocodex.ai/api-guide/account-mcp): programmatic access to a user's saved charts, techniques, transits and synastry (X-API-Key or OAuth)
- [Engine API](https://astrocodex.ai/api-guide/engine-api) / [Engine MCP](https://astrocodex.ai/api-guide/engine-mcp): 400+ astrology calculators over REST and MCP
- Connect an AI assistant: [ChatGPT](https://astrocodex.ai/api-guide/connect-openai), [Claude](https://astrocodex.ai/api-guide/connect-claude), [Grok](https://astrocodex.ai/api-guide/connect-grok), [Gemini](https://astrocodex.ai/api-guide/connect-gemini), [Cursor](https://astrocodex.ai/api-guide/connect-cursor)
- [Affiliate Program](https://astrocodex.ai/affiliate): revenue-share for referred paying users

## Optional

- [Blog](https://astrocodex.ai/blog): articles on Vedic + Western analysis, transits, dashas, retrogrades, compatibility
- [Astrology Guide](https://astrocodex.ai/guide): beginner-to-advanced learning path
- [Privacy Policy](https://astrocodex.ai/privacy)
- [Terms of Service](https://astrocodex.ai/terms)

## Per-date archives

Every calendar day in the rolling window 2026-04-26 through 2027-05-26 has a dedicated page:
- `/moon-calendar/YYYY-MM-DD/vedic` — Vedic (sidereal Lahiri) moon details
- `/moon-calendar/YYYY-MM-DD/western` — Western (tropical) moon details

Pages include: tithi, yoga, karana, vara, nakshatra (panchanga), moon sign + lunar day,
void-of-course windows, eclipse data when applicable, per-day astrological commentary.

Similarly, every retrograde period for the 9 graha/planets has dedicated pages:
- `/retrograde/{planet}/YYYY-MM-DD/{system}` — per-period detail with ingress/station dates,
  daily positions, aspects, per-sign effects.

## How our AI works

Every AI response is grounded in the actual chart data computed by our Swiss Ephemeris
service. We do not hallucinate planetary positions. The AI consumes structured chart_data
(planets, houses, aspects, yogas, dashas) and answers based on that — with citations to
classical sources (Brihat Parashara Hora Shastra, Phaladeepika, Lilly, Ptolemy, etc.).

## API access for developers

Developer API & MCP guide: https://astrocodex.ai/api-guide
- Account API/MCP: a user's own saved charts, techniques, transits, synastry (X-API-Key or OAuth sign-in)
- Engine API/MCP: 400+ standalone astrology calculators
- Works with ChatGPT, Claude, Grok, Gemini, Cursor and any MCP-aware client