Get all the countries!

https://restcountries.eu/rest/v1/all

Currency

https://restcountries.eu/rest/v1/currency/eur

Capital City

https://restcountries.eu/rest/v1/capital/tallinn

Calling Code

https://restcountries.eu/rest/v1/callingcode/7

Region

https://restcountries.eu/rest/v1/region/africa

Sub Region

https://restcountries.eu/rest/v1/subregion/western asia

ISO 639-1 Language

https://restcountries.eu/rest/v1/lang/et

https://restcountries.eu/rest/v1/lang/no

Country Code

https://restcountries.eu/rest/v1/alpha/co

https://restcountries.eu/rest/v1/alpha/col

Country Name Substring

https://restcountries.eu/rest/v1/name/eesti

https://restcountries.eu/rest/v1/name/estonia

Country Codes

https://restcountries.eu/rest/v1/alpha?codes=co;rus;no

Country Name Full Text

https://restcountries.eu/rest/v1/name/aruba?fullText=true

Try it yourself