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Business Day & Deadline API
x402
Business Day & Deadline API is a paid API for AI agents from businessdayapi.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).
Checks whether a given date is a business day for a specific country (and optional subdivision), accounting for local holidays and country-specific weekend rules.
Price / call$0.001
Success—
StatusUnknown
How this service works
Verified, always-current business-day arithmetic for ~200 countries incl. subdivisions (German Bundeslaender, US states) and correct per-country weekend rules (e.g. Fri/Sat in Egypt). Informational only — verify legally binding deadlines with the competent authority. Not legal advice.
Output
A JSON object confirming whether the queried date is a business day, including the country, optional region, the reason if it is not (e.g. 'weekend' or named holiday), the holiday name if applicable, the data source (e.g. nager.date), and a verifiedAt timestamp indicating when the holiday data was last confirmed.
Example use cases
Legal deadline verification for contracts
“Can you check if December 26th 2026 is a business day in the UK? I need to confirm whether a contract signing deadline that falls on that date is actually a working day or not.”
Invoice scheduling across international offices
“Is March 20th 2026 a working day in Egypt? I know they use a Friday-Saturday weekend there, so I want to make sure before I schedule an invoice due date.”
US state-specific payroll cutoff check
“Is November 11th 2026 a business day in California? I want to verify if Veterans Day is observed as a public holiday there before we set the payroll processing cutoff.”
Technical details
Endpoint
GEThttps://businessdayapi.com/v1/check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need authoritative, always-current business-day determination for a wide range of countries including those with non-standard weekends (e.g. Fri/Sat in Egypt, Thu/Fri in some Middle Eastern countries) or subnational holiday rules (e.g. German Bundesländer, US states). It is especially useful for scheduling systems, invoice/payment deadline automation, and contract date validation. Prefer it over general-purpose date libraries which may have stale or incomplete holiday data.
Side effects
- Missing required 'date' or 'country' parameters returns a 400 error
- Invalid ISO date format returns a parsing error
- Unsupported or unrecognized country code may return no data or an error
- Invalid region/subdivision code may be ignored or return an error
- Weekend override with an unrecognized custom format may fail silently or return an error
- Network timeout or upstream data source unavailability may cause delayed or failed responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"date": "2026-10-03",
"reason": "weekend",
"region": "BY",
"source": "nager.date",
"country": "DE",
"verifiedAt": "2026-08-17T00:00:00Z",
"holidayName": "Tag der Deutschen Einheit",
"isBusinessDay": false
}
}Tags
x402
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