Top 40 Open Data APIs For Developers
Open Data
Udemy Coupons, Courses & Instructors Data
Retrieve Udemy courses, coupons, instructors, and metadata.
Umeå Open Data
Open data of the city Umeå in northern Sweden.
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Learn moreSerpApi - Search API
SerpApi's Search API makes it easy and fast to scrape Google and other search engines.
UniDb
Data that helps people gain useful insight into universities in the United Kingdom.
Universities List
University names, countries and domains.
University of Oslo
Courses, lecture videos, detailed information for courses etc. for the University of Oslo (Norway).
UPC database
More than 1.5 million barcode numbers from all around the world.
Urban Observatory
The largest set of publicly available real time urban data in the UK.
Warnely
Composite travel-safety scores for 180 countries (FCDO + US State + GPI + WGI + live wire).
Wikidata
Collaboratively edited knowledge base operated by the Wikimedia Foundation.
Wikipedia
Mediawiki Encyclopedia.
Yelp
Find Local Business.
Guides
All guides- The State of Public APIs 2026: Data From 1,580 APIsWe measured all 1,580 public APIs in our directory. How many need a key, OAuth or nothing, which work from a browser, what is growing, and how many are down.
- API Caching: What 87 Public APIs Actually SendWe read the cache headers of 87 live public APIs. 31% send none, and only 37% answer a conditional request with a 304. What that means and how to cache them.