Calendar-Edge Bazi API
A Bazi charting API that handles true solar time, DST, and solar-term boundaries
- Problem
- Users ask Claude or ChatGPT for Bazi charts, but AI often fails around solar-term transitions, birth-location true solar time, historical daylight saving, and early/late Zi-hour rules. Developers who build their own calendar hit the same edge cases.
- Solution
- A no-login remote MCP endpoint and API that correctly handles true solar time, historical DST, solar-term transitions, and Zi-hour rules, returning structured four-pillar charts with explanations for AI and developer integration.
- Users
- AI users doing astrology charts and developers building Eastern metaphysics products
- MVP
- Birth time and location input; true solar time and historical DST correction; solar-term month pillar calculation; early/late Zi-hour rules; MCP and JSON API output
- Revenue
- Free tier with usage-based pricing or a premium calendar-data subscription
- Why now
- AI assistants are widely used for charting but frequently err on calendar edges; general models won't specialize, making a vertical API a good indie bet