
Natal Chart API: Why Birth Time and Data Quality Matter
Handle unknown birth times, ambiguous locations, historical time zones, and calculation assumptions without inventing missing natal-chart details.
COSMIC SIGNALS / CATEGORY
Start with the parts of an astrology application that need the clearest definitions: what a chart represents, which zodiac convention is selected, and what information the input record actually contains. These guides take a data-first approach while keeping the language approachable. Read the architecture guide for the bigger picture, then follow the zodiac and natal-chart articles for specific design decisions. The examples are educational and do not calculate a personal chart. A useful result begins with settings and assumptions that readers can understand.

Handle unknown birth times, ambiguous locations, historical time zones, and calculation assumptions without inventing missing natal-chart details.

Plan an astrology API with transparent chart inputs, separate interpretation layers, useful warnings, and a reproducible development workflow.

Understand zodiac conventions, stable sign identifiers, circular boundaries, and why a sign is not the same thing as an astronomical constellation.