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Business Day & Deadline API – Next Business Day
x402
Business Day & Deadline API – Next Business Day is a paid API for AI agents from businessdayapi.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).
Returns the next business day after a given date for a specified country and optional subdivision, accounting for local public 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 containing the input date, the country code, and the calculated next business day as an ISO 8601 date string — e.g. {"date":"2026-12-24","country":"DE","nextBusinessDay":"2026-12-28"}.
Example use cases
Legal filing deadline calculation
“My contract deadline falls on the next business day after December 31, 2025 in California — what date is that?”
Invoice payment due date in Egypt
“In Egypt, where the weekend is Friday and Saturday, what is the next business day after March 20, 2026?”
Financial settlement date in Japan
“What is the next business day after January 1, 2027 in Japan? I need to know when a bank transfer will settle.”
Technical details
Endpoint
GEThttps://businessdayapi.com/v1/next?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need accurate, up-to-date business day calculations for a wide range of countries including regional subdivisions (German states, US states) and non-standard weekend rules (e.g. Friday/Saturday in Middle Eastern countries). It is preferable over building your own holiday calendar logic or using generic date libraries that lack per-country public holiday data.
Side effects
- Invalid or unsupported country code returns an error
- Malformed date string causes a 400 Bad Request
- Unsupported subdivision code may fall back to national holidays or return an error
- Custom weekend override string with incorrect format returns a validation error
- Network timeout on transient infrastructure issues
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"date": "2026-12-24",
"country": "DE",
"nextBusinessDay": "2026-12-28"
}
}Tags
x402
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