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Japanese Business Day Calculator
x402
Japanese Business Day Calculator is a paid API for AI agents from x402-ja-api.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Calculates Japanese business days by checking if a date is a business day and optionally adding/subtracting business days, supporting both standard and bank holiday calendars.
Price / call$0.005
Success—
StatusUnknown
How this service works
Calendar and Japan data APIs for AI agents: worldwide holidays and business days (200+ countries), plus Japanese text-to-structure (address, name, bank, company normalization). Pay per call in USDC via x402, no API key.
Output
A JSON object with the resolved result date, the weekday name, whether the date is a business day/holiday/weekend, the holiday name if applicable, the next and previous business days, and the last business day of that month — all computed against either the standard (Sat/Sun + public holidays) or bank (adds Dec 31–Jan 3) Japanese calendar.
Example use cases
Payment deadline date calculation
“I need to schedule a Japanese bank transfer — what is 3 bank business days after October 31, 2026? Use the bank calendar.”
Invoice due date verification
“My Japanese supplier says the invoice is due on January 4, 2027 — is that actually a business day under the standard calendar, or do I need to adjust?”
Month-end closing date lookup
“What's the last standard business day of March 2027 in Japan? I need to set our books-close deadline.”
Technical details
Endpoint
GEThttps://x402-ja-api.onrender.com/v1/jp/business-dayWhen to prefer
Choose this endpoint when you need Japan-specific business day logic, including Japanese public holidays and optionally Japanese bank holiday periods (Dec 31–Jan 3). Prefer over generic business-day libraries when accuracy against the official Japanese holiday calendar matters, especially for financial, banking, or legal date calculations denominated in JPY or governed by Japanese law.
Side effects
- Invalid date format (not YYYY-MM-DD) returns a 400 error
- Offset value outside -2000 to 2000 range rejected
- Unknown calendar enum value rejected
- Payment not provided or rejected returns HTTP 402
- Service unavailable (cold start on Render free tier) causes timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"add": 1,
"date": "2026-09-18",
"result": "2026-09-24",
"weekday": "Friday",
"calendar": "bank",
"isHoliday": false,
"isWeekend": false,
"holidayName": null,
"isBusinessDay": true,
"nextBusinessDay": "2026-09-24",
"previousBusinessDay": "2026-09-17",
"lastBusinessDayOfMonth": "2026-09-30"
}
}Tags
x402
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