True Sky

Calculate natal charts, transits, synastry, composite charts, and solar/lunar returns directly in ChatGPT.

Features:

• Natal Charts - Planetary positions, house cusps, and aspects
• Transit Data - Track planetary aspects to your birth chart with exact timing
• Synastry - Relationship comparison between two charts
• Composite Charts - Midpoint relationship charts
• Solar & Lunar Returns - Birthday and monthly return charts

Supports 7 house systems (Placidus, Whole Sign, Koch, Equal, and more), 11 zodiac systems (Tropical, Lahiri/Vedic, True Sidereal, and more), and optional asteroids.

Free: 100 calculations per day.

claude mcp add --transport http true-sky https://truesky.masteringthezodiac.com/mcp