Explore APIs

ApogeoAPI is a REST API that supplies comprehensive geographic data—countries, states/provinces, cities, timezones, languages, and IP‑geolocation—and provides live exchange rates for over 161 currencies with 25 selectable base currencies.

The API offers a GET endpoint that accepts an OSGB36 easting and northing as path parameters and returns the equivalent WGS84 latitude and longitude.

The CountryStateCity API offers RESTful endpoints that return structured geographic data—countries, their states/regions, and cities—in JSON format, covering over 250 countries, 5,300+ states, and 150,000+ cities.

The ip2geo.dev API enables developers to convert single or bulk IP addresses into detailed geolocation data using a REST endpoint or provided SDKs.

BigDataCloud's IP Geolocation API returns detailed geographic, ownership and connectivity information for a given IPv4 address, including an estimated confidence‑area and a security hazard report, with optional language localisation for locality names. It provides separate endpoints for full geolocation data and for confidence‑area data only.

Forward and reverse geocoding using open data

Postali offers a free, no‑key REST API that lets you look up, validate, and search official postal‑code information for Mexico, Colombia, and Spain, returning details such as state, municipality, and settlement names.

Postcodes.io provides a free API for validating UK postcodes, retrieving detailed geographic, administrative and demographic data for a given postcode, and performing bulk reverse‑geocoding of latitude/longitude coordinates to their nearest postcode. It also offers endpoints to find nearby postcodes and look up outward code information.

The US ZIP Code API validates and looks up city, state, and ZIP Code combinations, returning standardized address information for a single query (GET) or up to 100 queries (POST).