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Chinese Age Calculator (Xu Sui / Nominal Age)
x402
Chinese Age Calculator (Xu Sui / Nominal Age) is a paid API for AI agents from api.cn402.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-13).
Computes Chinese nominal age (xu sui), Western actual age, days lived, and lunar birthday from a given birth date
Price / call$0.008
Success—
StatusUnknown
How this service works
Chinese age calculator, nominal age, xu sui, 虚岁, Chinese traditional age system, Asian age, lunar birthday, Chinese age vs Western age, how old in Chinese culture. Compute Chinese nominal age (xu sui), Western actual age, days lived, and lunar birthday from any birth date.
Output
Returns a JSON object with the input birth date, reference date (on), Western age as an integer, Chinese nominal age (xu sui) as an integer, number of days lived, and the lunar birthday date string
Example use cases
Example prompt
“What is my Chinese nominal age (xu sui) and lunar birthday? I was born on March 15, 1990.”
Technical details
Endpoint
GEThttps://api.cn402.com/age/calcWhen to prefer
Use this endpoint when you need to compute Chinese nominal age (xu sui) alongside Western age and lunar birthday from a single birth date — particularly for apps serving Chinese-speaking users, cultural events, BaZi astrology workflows, or any context where traditional Chinese age reckoning matters
Side effects
- Invalid or missing birth date returns an error
- Future birth dates may produce unexpected results
- Malformed date format (non-ISO) may be rejected
- Very old or unusual dates may have limited lunar calendar support
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| on | string | On (optional) |
| birth | string | Birth (optional) |
Tags
x402
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