Standard Data APIs.
Reference data APIs serve the lists everyone copies into a constants file and never updates — countries, currencies, languages, timezones, ISO codes. Query them instead of shipping a stale table that breaks the day a code changes.
Also called reference data APIs, lookup APIs or ISO code APIs50 services in this categoryStandard Data APIs
50 servicesGenerate iCal API
Generate downloadable .ics files or signed links from event details, with reminders, recurrence, all-day events, and full time zone support.
ApyHubVerifiedHosted on ApyHubConvert Currency to Multiple Currencies API
Convert one source currency into many target currencies, with optional date-based rates. Returns pair keys with rates, or false when unavailable.
ApyHubVerifiedHosted on ApyHubConvert Timezone and Meeting Planner API
Convert local datetimes across IANA time zones with DST-aware offsets, or plan meetings across zones. Returns source, UTC, and target times.
Business Days Calculator API.
Add business days, count them, or check a single date against country holiday calendars for US, GB, CA, AU, DE, FR, and IN.
Advanced Schedule Cron API
Compute upcoming fire times for a 5-field cron expression. Returns next_runs, a count, the timezone, and the reference time used, all in UTC.
Language Dictionary API
Get ISO 639-1 languages with the code, English name, and native name. Built for language pickers, localisation, and code-to-name lookups.
ApyHubVerifiedHosted on ApyHubPublic Holidays API
Get public holidays by country and year, plus the supported country list. Built for business-day logic, scheduling, and holiday calendars.
ApyHubVerifiedHosted on ApyHubWorking Day Calculator API
Count working days between two dates for a given country. Returns total days, weekends, holidays, and working_days for scheduling and payroll.
ApyHubVerifiedHosted on ApyHubConvert Date & Time Formats API
Convert ISO strings, unix epochs, or the current time into UTC, localized, and relative formats. Returns weekday, week number, and epoch values.
Search US Address API
Search address matches from a text query, with optional country filtering and result limits. Built for autocomplete, lookup, and validation.
Dosvak LLCAdvanced IBAN Validation API
Validate an IBAN from a single query parameter and get a success and code response. Built for payment flows and quick bank-detail checks.
Foreign Exchange Rates API
Get exchange rate data for any base currency. Returns a success flag, numeric code, and the rate blocks used in pricing, billing, and reporting.
Which Standard Data API do you need?
The question you arrived with, and the endpoint that answers it.