Free, open source API providing comprehensive data on all the countries in the world, including information on languages, currencies, population, capital, region, area, timezones, continents, flag, latitude and longitude. The original inspiration for this project, since expanded on by several other services.

The World Factbook published by the Central Intelligence Agency (CIA) offers free country profiles in the public domain, updated weekly. They contain extensive data, of which we use a small subset including background, geography, climate, terrain, natural resources, other languages, population, industries.

Free REST API providing regularly updated assessments of each country's safety, based on an aggregated list of official travel advisories issued by governments across the globe.

Offers essential tools to develop maps, optimize routes, and build intelligent location-based applications and services, for very reasonable pricing. We use the free tier to determine a client location based on their IP, to work out how far away each country is from your location.

Provides accurate and precise global weather data with very reasonable free tiers for educational purposes. We use their OneCall API to provide current weather for capital cities.

Frankfurter is an open-source API for current and historical foreign exchange rates published by the European Central Bank. We use it to povide the currency exchange rates for each country.

Provides a huge range of APIs for personal and commercial use. We use the Places API to source random photos for each country and display satellite maps.

The leading AI language model developed by OpenAI. Used to generate supplemental information for countries, including tourism data, some flag descriptions, and mapping country codes between the other services.