Facts about where and when, computed exactly: sunrise and sun position, geodesic distances, EU VAT validation, place lookups and time arithmetic.
Compute sunrise, sunset, solar noon, civil dawn/dusk, golden hours and day length for any latitude/longitude and date — with the exact NOAA solar equations, accurate to about a minute. Answers agents repeatedly get wrong from memory.
Great-circle (haversine) distance between two latitude/longitude points in km, miles and nautical miles, plus initial bearing and the geographic midpoint. Deterministic spherical math on the IUGG mean Earth radius.
Validate any EU VAT number against VIES — the European Commission's live registry: validity, registered trader name and address by member state. The check every B2B invoice flow needs before applying the reverse charge.