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Business Days Calculator
x402
Business Days Calculator is a paid API for AI agents from datetime.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Add or subtract business days to a date, or count business days between two dates, skipping weekends and optional custom holidays.
Price / call$0.002
Success—
StatusUnknown
How this service works
Add/subtract business days to a date, or count business days between two dates — skipping weekends and optional holidays.
Output
Returns the resulting date after adding/subtracting the specified number of business days, or the count of business days between two dates, after skipping weekends and any provided holiday dates.
Example use cases
Invoice payment deadline calculation
“A client invoice is issued on 2025-07-01 and payment is due in 30 business days — what's the actual due date? Skip weekends and the US Independence Day holiday on 2025-07-04.”
Project milestone scheduling
“My project kicks off on 2025-09-01 and I need to know what date falls exactly 45 business days later, excluding Saturdays and Sundays.”
SLA compliance working-day count
“Count the number of business days between 2025-01-06 and 2025-01-24, treating only Mondays through Fridays as working days and skipping the MLK Day holiday on 2025-01-20.”
Technical details
Endpoint
POSThttps://datetime.openverbs.com/v1/business-days?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need precise business-day arithmetic — adding or subtracting working days or counting them between two dates — especially when custom holidays or non-standard weekend definitions are required. It is purpose-built for scheduling, SLA tracking, invoice due-date calculations, and any workflow that must skip weekends and holidays rather than simply counting calendar days.
Side effects
- Missing required 'start' field returns a validation error
- Providing both 'days' and 'end' simultaneously causes a conflict error
- Invalid date format (not YYYY-MM-DD) returns a pattern mismatch error
- 'days' value outside the -3650 to 3650 range returns a validation error
- Invalid IANA timezone string returns a timezone error
- Malformed holiday date strings return a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| end | string | End date to count business days to. Provide this OR `days`. |
| days | integer | Business days to add (negative to subtract). Provide this OR `end`. |
| start | string | Start date (YYYY-MM-DD). |
| weekend | array | Weekend weekdays (Mon=1 … Sun=7). Defaults to [6,7]. |
| holidays | array | Extra non-working dates to skip (YYYY-MM-DD). |
| timezone | string | IANA timezone. Defaults to UTC. |
Tags
x402
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