Business Days & Holidays
Is 2026-07-03 a business day in the US? (No — it's the observed Independence Day.) Add/count business days and fetch public holidays for 49 countries, 2024–2030, with correct regional weekends.
Read the docs →Email Checker-Plus
Syntax, disposable-domain detection against 121,570 known throwaway domains, role-account flags, and real MX lookups — in a single call, before the bad address lands in your database.
Read the docs →Currency Conversion
Conversions and rate tables from the European Central Bank's official reference feed, refreshed every ECB business day. No scraped rates, no mystery sources.
Read the docs →Quickstart
curl "https://metermaid.square-firefly-0154.workers.dev/v1/businessdays/is-business-day?country=US&date=2026-07-03" \
-H "X-Api-Key: mm_your_key_here"
{
"country": "US",
"date": "2026-07-03",
"weekday": "Friday",
"is_weekend": false,
"is_holiday": true,
"holiday_name": "Independence Day (substitute day)",
"is_business_day": false
}Why these three?
Every product team re-implements the same three chores — and gets the edge cases wrong: observed holidays, Friday/Saturday weekends, throwaway email domains, stale FX rates. MeterMaid implements them once, carefully, with the data sources cited in the open: holiday data from the date-holidays dataset, the disposable-domain list from the open disposable-email-domains project, rates straight from the ECB. Deterministic answers, no AI guesswork, sub-50 ms responses from Cloudflare's edge.
Pricing
| Plan | Included calls | Price | Where |
|---|---|---|---|
| Free | 100 calls/day | $0 | RapidAPI or direct |
| Starter | 10,000 calls/month | See RapidAPI listing | RapidAPI |
| Pro | 100,000 calls/month | See RapidAPI listing | RapidAPI |
Direct billing (Lemon Squeezy) is available for teams that prefer invoicing outside a marketplace — ask via the docs page. All plans include all three APIs; calls are metered per API key across endpoints.