Simple and fast and free weather API from OpenWeatherMap you have access to current weather data, hourly, 5- and 16-day forecasts. Historical weather data for 40 years back for any coordinate. Weather maps, UV Index, air pollution
and historical data

You may be asking yourself: “What is the most popular and top used APIs out there?” Connect to URL Shortener ServiceConnect to API The Nasa API is an API that queries Nasa’s database and returns statistics about: Related How to use the Nasa APIConnect to NasaAPIConnect to API An API for interesting facts about numbers. Connect to Text-to-SpeechConnect to API The vin-decoder API is an API that decodes vehicle identification numbers and provides detailed vehicle history reports. Related: Top TV APIsConnect to UtellyConnect to API The Flight Data API (created by travelpayouts) is a simple API that provides flight trends and popular destinations for your website or application’s users.

Music, meet code. Powerful APIs, SDKs and widgets for simple and advanced applications.

Amazon Cognito User Pools Auth API Reference