Business Days & Holidays API
PayAPI House. UK (England & Wales, Scotland, Northern Ireland) and US federal bank holidays plus working-day maths: is a date a holiday, and what date is N business days from a start date. Example: GET /house/business-days?region=england-and-wales&start=2026-10-13&add=5 -> 2026-10-20. Sources: GOV.UK bank holidays (Open Government Licence v3.0) and US OPM federal holidays (public domain). $0.002 USDC per call on Base; bad requests are not charged.
1 of 2 routes settlement-verified · $0.002 USDC/request · 2 endpoints · Data · base network · x402 protocol
Verified routes
GET /house/business-days· $0.002 · 2026-10-13 · receipt
Other routes are unverified.
Networks: Base (settlement-verified)
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpHow to call this API
Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.
By PayAPI House