Data sources
Where each dataset behind the APIs comes from, under what licence, and when it was last refreshed. Live sources are queried on every request.
| Dataset | Source | Licence | Refresh | Last updated |
|---|---|---|---|---|
| World Universitiesworld-universities-database | Hipo university-domains-list, plus the original curated set | MIT | Imported manually; next refresh planned quarterly | 2026-10-12 |
| World Citiesworld-cities-database, geocoding | GeoNames cities15000 (cities with 15,000+ people) | CC BY 4.0 (attribution: GeoNames) | Rebuilt manually with scripts/build-world-cities.mjs | 2026-10-12 |
| Airport Codesairport-codes | Curated dataset of 1,000+ commercial airports | APIStack | Updated when airports open, close or change codes | 2025-08-20 |
| Public Holidayspublic-holidays, business-days-calculator, date-calculator | date-holidays rules v3.26.5 | ISC (data: CC BY-SA 3.0) | With each library release | With each release |
| Time zonesworld-time, timezone-converter | IANA time zone database 2026a | Public domain | With the runtime | With each release |
| Exchange ratescurrency-exchange-rates | European Central Bank euro foreign exchange reference rates | Free reuse with source acknowledgement | Daily, working days around 16:00 CET (checked hourly) | Live |
| EU VAT registrationsvat-iban-validation | European Commission VIES service | Public service | Live lookup on every request | Live |
| IBAN and BIC rulesvat-iban-validation | ibantools (SWIFT IBAN registry formats) | MIT / MPL-2.0 | With each library release | With each release |
| Company registerscompany-lookup | GLEIF Global LEI Index and U.S. SEC EDGAR | CC0 (GLEIF); public domain (SEC) | Live lookup on every request | Live |
| Economic indicatorseconomic-indicators | World Bank World Development Indicators | CC BY 4.0 (credit: World Bank) | Live, cached 12 hours; the World Bank updates several times a year | Live |
| Sanctions listssanctions-screening | U.S. Treasury OFAC SDN and Consolidated (non-SDN) lists | Public domain (U.S. government) | Downloaded every 6 hours | Live |
| Domain registration datadomain-lookup | RDAP from the registry listed by IANA, rdap.org as fallback | Public registry data | Live lookup on every request | Live |
Found a wrong record? Tell us with the API, the record and the correct value; corrections usually go live within a few days.