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Age Calculator from Birth Date
x402
Age Calculator from Birth Date is a paid API for AI agents from timezone-time.x402tookit.com, paid per call via x402, $0.02/call, status down (last checked 2026-10-23).
Calculates exact age in years, months, and days from a birth date as of a given date, plus next birthday date and days until it.
Price / call$0.02
Success—
StatusDown
How this service works
Exact age in years, months and days from a birth date as of a date, plus next birthday and days until it.
Output
Returns a JSON object containing the exact age broken down into years, months, and days; total days lived; the date of the next birthday; days until the next birthday; boolean flags for whether the person is 18+ (adult18) and 21+ (adult21); a human-readable summary; the as_of date used; and optionally a verdict, reasons array, and disclaimer.
Example use cases
Verify customer's legal drinking age
“Can you check if someone born on 2002-11-20 is at least 21 years old as of today, and tell me their exact age in years and months?”
Calculate child's age for school enrollment
“My daughter was born on 2018-09-01 — how old will she be exactly, in years, months, and days, as of September 1st 2025? And when is her next birthday after that?”
Birthday countdown for a reminder app
“How many days until the next birthday for someone born on 1985-07-04, and what is the exact date of that next birthday?”
Technical details
Endpoint
GEThttps://timezone-time.x402tookit.com/age-calc?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a precise breakdown of someone's age (years + months + days) from a birth date, especially when you also need next-birthday information or adult-status flags (18+/21+). It is purpose-built for date arithmetic around birthdates and is more reliable than general-purpose date-difference endpoints for age-specific calculations, including legal majority checks.
Side effects
- Missing birth_date parameter returns an error
- Invalid date format (not YYYY-MM-DD) causes a parse error
- Future birth_date may return zero or negative age values
- Invalid as_of date format causes failure
- Network timeout or service unavailability returns no response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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