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Japan Business Day API – Add Business Days
x402
Japan Business Day API – Add Business Days is a paid API for AI agents from japan-business-day-api.matchan962.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Given a starting date and an integer offset, returns the resulting Japanese business day by skipping weekends and national/bank holidays.
Price / call$0.01
Success—
StatusUnknown
How this service works
Add or subtract N Japanese business days from a date (e.g. settlement date T+2, delivery ETA). Skips weekends and national holidays; optional bank calendar.
Output
A JSON object containing the input date, the days offset requested, the resulting business date after skipping weekends and applicable Japanese holidays, and the calendar type used (national or bank).
Example use cases
Payment settlement date after holidays
“A payment is initiated on December 26, 2025. What date is 3 Japanese bank business days later, skipping year-end bank holidays?”
Contract due date calculation
“A contract signed on May 1, 2026 requires delivery in 10 Japanese national-calendar business days — what's the exact due date?”
Trade clearing date in Japan
“If a securities trade is executed on July 18, 2025, what is the Japanese bank-calendar settlement date 2 business days out?”
Technical details
Endpoint
GEThttps://japan-business-day-api.matchan962.workers.dev/v1/add-business-days?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to compute a future or past Japanese business date by advancing or retreating a fixed number of working days, and you need accurate skipping of Japanese national holidays and/or bank-specific year-end holidays. Prefer it over generic date libraries that lack Japan-specific holiday data. Choose the 'bank' calendar when dealing with financial transactions, settlements, or banking deadlines; use 'national' for general business scheduling.
Side effects
- Missing required query parameters 'date' or 'days' returns a 400 error
- 'days' value outside the -366 to 366 range is rejected
- Invalid date format (non-ISO 8601) causes a parsing error
- HTTP 402 returned if payment is not provided via x402 protocol before the data response
- Invalid 'calendar' enum value rejected; must be 'national' or 'bank'
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"date": "2026-12-28",
"days": 3,
"result": "2027-01-04",
"calendar": "bank"
}
}Tags
x402
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