What's an "API call"?

API (Application Programming Interface) is just a tech term for a tool that gets data from a database so a developer can display that data in their application, such as Tomorrow.io's collection of data layers like weather, air quality, pollen etc. Our API endpoints give developers a common, systematic way to pull that data into whatever program they want to use via a single API. Doing so is called an "API call", whereas the developer calls the database, asks for a specific piece of data, and the database sends back that data.