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Workday Calendar API – Single Date Business Day Check
x402
Workday Calendar API – Single Date Business Day Check is a paid API for AI agents from workday-calendar.regnotes.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).
Returns whether a specific date is a business day in a given country, accounting for public holidays, weekends, and make-up workdays, plus the adjacent previous and next business days.
Price / call$0.001
Success—
StatusUnknown
How this service works
Whether a date is a business day in a country (holiday/weekend/make-up workday aware), plus the previous and next business day.
Output
A JSON object with: the queried date and country, the holiday name (if applicable), the weekday number, boolean flags for weekend/business_day/weekend_workday, and the ISO dates of the next and previous business days.
Example use cases
Payment settlement date validation
“We're scheduling a wire transfer to land on March 28, 2025 in the UK — is that actually a business day, and if not, what's the next one we should target?”
SLA deadline calculation
“Our SLA says we need to respond within one business day. The ticket came in on April 18, 2025 in Germany — is that a working day and what's the next business day if it's not?”
Cross-border payroll check
“We're running payroll in Brazil on November 15, 2025 — is that a business day there, and what's the previous business day in case we need to move it earlier?”
Technical details
Endpoint
GEThttps://workday-calendar.regnotes.workers.dev/v1/business-day?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to check a single specific date's business day status in one of 50+ supported countries, with full awareness of national public holidays, standard weekends, and make-up workdays. Prefer this over general date libraries when country-specific holiday data and make-up workday logic are required. For counting business days between two dates or computing an offset of N business days, use the sibling endpoints on the same provider.
Side effects
- Invalid date format (not YYYY-MM-DD) returns a 400 error
- Unsupported country code (not in the allowed enum) returns a 400 error
- Date out of supported range may return an error or empty result
- Payment failure (x402) if USDC balance is insufficient returns a 402 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"date": "2026-11-03",
"country": "JP",
"holiday": "Culture Day",
"weekday": 2,
"weekend": false,
"business_day": false,
"weekend_workday": false,
"next_business_day": "2026-11-04",
"previous_business_day": "2026-11-02"
}
}Tags
x402
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