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x402 Utils – Date Arithmetic & Difference Calculator
x402
x402 Utils – Date Arithmetic & Difference Calculator is a paid API for AI agents from qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).
Add or subtract an ISO 8601 duration to/from a date, or compute the difference between two dates in days, weeks, months, years, seconds, and business days (with country-specific public holidays).
Price / call$0.001
Success—
StatusUnknown
How this service works
Add or subtract an ISO 8601 duration (P1M, P2W, PT36H) to a date, months clamped to the month's end; or count the days, weeks, calendar months, years, seconds and business days (Monday to Friday, less a country's public holidays) between two dates. Also the weekday, ISO week and day of year.
Output
A JSON object with a 'start' section containing the date, weekday, ISO week number, and day of year; and optionally a 'between' section with the difference expressed in days, weeks, months, years, seconds, and business days (adjusted for country-specific public holidays when a country code is supplied).
Example use cases
Contract deadline extension calculator
“I signed a contract on 2025-03-15 with a 6-month term (P6M). What date does it end, and what day of the week is that?”
Sprint duration in business days
“How many business days are there between 2025-09-01 and 2025-09-30 in the UK, excluding British public holidays?”
Age in days and weeks
“How many days, weeks, and full calendar years are between 1990-06-14 and today, 2025-07-10?”
Technical details
Endpoint
GEThttps://qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws/v1/date?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need precise calendar arithmetic — adding or subtracting ISO 8601 durations (with correct month-end clamping), computing multi-unit differences between two dates, or getting business-day counts that respect a specific country's public holidays. It is preferable over general-purpose code execution or LLM reasoning for date math because it handles edge cases like month-end clamping, ISO week numbers, and country-specific holiday calendars out of the box.
Side effects
- Missing 'start' parameter returns a 400-level error
- Malformed ISO 8601 duration (e.g. 'P1month' instead of 'P1M') may return an error or unexpected result
- Invalid country code may result in no holiday adjustment or an error
- Providing neither 'end' nor 'add'/'subtract' returns only start-date metadata without difference or arithmetic
- Dates outside supported range may produce inaccurate results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"start": {
"date": "2026-10-25",
"weekday": "Sunday",
"iso_week": 43
},
"between": {
"days": 61,
"months": 2,
"business_days": 42
}
}
}Tags
x402
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