Free

Open Library is a universal catalog for book metadata, offering free access to book data.

GitHub offers free and paid plans for storing and collaborating on code. Some plans are available only to personal accounts, while other plans are available only to organization and enterprise accounts.

Get information about countries via a RESTful API. Free and open source.

Weather forecasts, nowcasts and history in a fast and elegant way. Provides access to current, forecast, and historical weather data for any location on Earth.

A simple HTTP REST API for searching and retrieving live articles from all over the web.

Free for cryptocurrency data.

The Flickr API provides access to a vast collection of photos and metadata, allowing developers to create applications that interact with Flickr's photo-sharing platform.

The YouTube Data API allows you to access YouTube data, such as videos, playlists, and channels, with a free quota of 10,000 units per day.

Free for European statistical data.

Free for Pokémon data.

Free fake and reliable API for testing and prototyping.

Free tier for movie and TV data.

Welcome to the NASA API portal. The objective of this site is to make NASA data, including imagery, eminently accessible to application developers. This catalog focuses on broadly useful and user friendly APIs and does not hold every NASA API.

Free for Reddit data.

Free and open access to global development data.

Free for music database.