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Open Ephemeris

ChatGPT plugin

Accurate charts & Human Design

View in ChatGPT directory

Open Ephemeris is an astrology calculator for ChatGPT. Ask for your birth chart, your sun, moon and rising signs, what's happening in your chart this month, your Human Design bodygraph, your Vedic kundli or your BaZi Four Pillars, and ChatGPT calculates it instead of guessing.

Every planet position comes from NASA's JPL DE440 ephemeris, accurate to a fraction of an arcsecond, with the correct timezone for your birth place and date. Language models alone often get your rising sign wrong; this plugin gets the chart right first, then ChatGPT interprets it.

What you can ask:

  • Natal chart: "make my birth chart", "what's my rising sign", "my big three"
  • Timing: "what transits are coming up", "when is my Saturn return", "today's horoscope for my chart"
  • Relationships: "are we compatible", "synastry with my partner", "our composite chart"
  • Human Design: "show my bodygraph", "what's my type and authority"
  • Other systems: Vedic chart and nakshatra, Chinese BaZi, progressed chart, solar return, moving to a new city (relocation), moon phases, eclipses

Charts and bodygraphs appear inline in the chat and you can click any planet, house or gate for an explanation.

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Movement

From our daily snapshots over the last 30 days.

Rank by placement

#860of 11,36073places up24h106places up7d
#729#1,124#1,519#1,914Oct 6Oct 12Oct 18Oct 24Oct 30Nov 4

Rank in Other

#61of 8167places up24h15places up7d
#53#78#103#128Oct 6Oct 12Oct 18Oct 24Oct 30Nov 4

7 listing changes logged · latest Oct 28: Description, Version, Categories and 1 more. See what changed

In its category

How this plugin compares with others in the same category. Positions are counted within the category, not across the whole directory.

Other61st of 816 by placement
#PluginPosition7d
59QuintoAndar#82225places down
60Fotocasa#83220places down
61Open EphemerisThis page#860106places up
62CARFAX#86216places down
63Break The Web News#88216places down

All 816 Other plugins

Example prompts

  • “Make my natal chart: born March 14, 1990 at 6:45 AM in Chicago, Illinois. What are my sun, moon and rising signs?”
  • “What's happening in my chart this month? I was born July 2, 1988 at 3:20 PM in Toronto, Canada.”
  • “Show me my Human Design bodygraph: born November 9, 1985 at 11:05 PM in London, UK. What's my type, strategy and authority?”
Categories
Made by
Open Ephemeris · Website
Sign-in
On Install
Availability
Available
Version
2.2.0
Created
September 5, 2026
More info
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