Public APIs
There are a large number of public APIs that you can use for your project. There are many directories that you can browse:
Here’s some that we’ve seen used successfully, or that appear to private free (and often authenticated) access to their services.
Data Services
APIs that let you query a large amount of data, and return results.
Calendar
- Eventbrite: Find scheduled events.
- Holidays API: Lookup holiday data.
Entertainment
- Marvel Developer Portal: Comic service.
- Open Movie Database: Movie data.
- Open Library: Book data.
- Pokemon API: Everything about Pokemon.
- YouTube API: Search video playlists.
Finance
- Market Data API: Financial data, unknown pricing.
- MarketStack: Historical market data, 100 free requests/month.
Weather
- Open Weather Map: Current weather forecast.
- Weatherstack: Historical weather data.
Other
- REST Countries: Geographic data.
- Stack Exchange: Question and answer data from Stack Overflow.
Image Services
Browse and return a useful image.
- NASA Open APIs: NASA imaging data.
Functional Services
APIs that provide a meaningful service; more than just querying a large dataset.
- News API: Search worldwide news.
- Phone Number Validator
- Registered Domain Name Search: Check domain registration.