Birth Chart vs Character AI

Birth Chart, Character Analysis & Daily Horoscope

The astrology stack in one API. Given a birth date, time, latitude, longitude and timezone, the calculation endpoint returns the position of every planet — sign, degree and longitude — together with the houses and the ascendant. That is the raw chart, computed rather than described.

The analysis endpoint reads that chart back as prose: personality traits, strengths, tensions and the interplay between sun sign and ascendant, in the language you request. The horoscope endpoint produces daily, weekly and longer-horizon readings for the same chart, so a product can show a fresh page every morning without storing anything but the birth data.

A today's-chart endpoint returns the current sky with no input at all, which is what you want for a general daily horoscope page.

Open Birth Chart, Character Analysis & Daily Horoscope →

Character AI — create custom characters & chat

The API creates a character with a defined personality, traits and backstory, and keeps it consistent across a conversation.

Games, companion apps and interactive fiction use it where a generic assistant would break immersion.

Open Character AI — create custom characters & chat →