Public APIs
A huge, community-curated list of free APIs (about 2,000 in 51 categories), each marked with whether it needs a key, works over HTTPS and can be used straight from a web page.
What you can do with it
- Find live data for a first coding project without signing up for anything
- Build single-file web pages with maps, weather, holidays and more
- Pick reliable data sources for side projects and prototypes
Worth knowingIt's a volunteer-maintained list, not a guarantee. In our test the listed ISS API (Open Notify) put the space station on the wrong side of the planet, one 'no auth' API now demands a key, and half the CORS entries say Unknown. The top of the README is an advert for a paid API suite.
The full tutorial
01Find the easy APIs in the listFREE02Test an API before you trust itMEMBERS03Open your live dashboardMEMBERS04Understand fetch() and JSON in plain EnglishMEMBERS05Watch it in DevTools, then break it on purposeMEMBERS06Make it yours, and stay inside the rulesMEMBERS
Build a live space-station tracker (and more) from free APIs · ~30 min · tested 2026-10-09
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