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Agent402 UK Business Day Calculator
x402
Agent402 UK Business Day Calculator is a paid API for AI agents from agent402.co.uk, paid per call via x402, $0.001/call, status down (last checked 2026-10-12).
Adds or subtracts N business days from a start date, optionally accounting for UK bank holidays by region
Price / call$0.001
Success—
StatusDown
How this service works
Don't burn tokens on deterministic work. Go/no-go jobs first: payout preflight, text firewall (PII/secrets), budget check — then rails, calendars, finmath. x402 USDC on Base. UK + global. agent402.co.uk — not agent402.tools. $0.001–$0.002 USDC on Base. No API keys.
Output
Returns the resulting date after adding or subtracting the specified number of business days from the start date, with weekends and any relevant UK bank holidays (fetched from GOV.UK) excluded from the count. Typically includes the result date in YYYY-MM-DD format and may include details about which holidays were skipped.
Example use cases
Invoice payment deadline calculation
“Our invoice is dated 2025-07-15 and payment terms are net 10 business days — what's the exact due date, excluding UK bank holidays for England and Wales?”
Contract notice period end date
“I need to give 20 business days notice from today, 2025-06-10, in Scotland. What date does the notice period end, taking Scottish bank holidays into account?”
Backwards deadline from cut-off date
“Our regulatory submission cut-off is 2025-12-31 and we need to start 5 business days before that — what's the latest start date, using UK England and Wales holidays?”
Technical details
Endpoint
GEThttps://agent402.co.uk/v1/time/add-business-days?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need accurate business-day arithmetic that accounts for real UK bank holidays sourced from GOV.UK, rather than hand-coded or estimated holiday lists. Ideal for SLA calculations, invoice payment terms, contract notice periods, regulatory deadlines, and any cut-off math in a UK business context. Prefer this over generic date calculators when UK regional holiday variations (England and Wales vs Scotland vs Northern Ireland) matter for correctness.
Side effects
- Invalid start date format (not YYYY-MM-DD) returns a 400 error
- Non-integer or missing days parameter causes a validation error
- Unsupported region string returns an error or falls back to no holidays
- GOV.UK bank holiday API unavailability may cause holiday data to be missing or stale
- Negative days value that overshoots the start date may return unexpected early dates
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"days": 3,
"start": "2026-08-28",
"region": "england-and-wales",
"result": "2026-09-03"
}
}Tags
x402
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