Open source
Open-Meteo
Free weather forecast and historical weather API with no API key
Public APIsFree open weather API
Alternatives to OpenWeather
12 tools like OpenWeather, chosen by what they do. About OpenWeather
Freemium
APILayer
Marketplace of 40+ APIs for finance, weather, geolocation and data
Public APIsReady to use APIs
Freemium
Alpha Vantage
Stock market, forex and crypto data API with a free API key
Public APIsFree stock market API
Open source
httpbin
Simple HTTP service that echoes requests and returns test responses
Public APIsHTTP request testing serviceInactive
Curated
API Ninjas
Collection of production-ready data APIs with a free API key
Public APIsCollection of useful APIs
Open source
Freemium
ExchangeRate-API
Currency exchange rate API for 165 currencies with a free plan
Public APIsCurrency conversion API
Open source
Open source
Frankfurter
Free exchange rate API for 219 currencies, with history back to 1948
Public APIsFree currency exchange rates
Curated
REST Countries
Country data API with 250+ countries and 90+ fields per record
Public APIsCountry data over REST
Freemium
ReqRes
Free hosted REST API for testing and prototyping with real responses
Public APIsHosted test REST API
Open source
JSONPlaceholder
Free fake REST API with six resources and no signup required
Public APIsFree fake REST APIInactive