Data & APIs — Verified Free

Every data & apis listing, ranked by how free it really is

12 verified · 6 truly free · sorted by Free Score.

You getThe full Wikidata graph as downloadable JSON and RDF

You getHundreds of thousands of federal, state and local datasets

You getMetadata for hundreds of millions of scholarly works, authors and institutions

You getThe entire world map as downloadable data (planet file and regional extracts)

You getPetabytes of crawled web pages, updated monthly

You getWeather forecasts and historical data with no API key at all

You getHundreds of thousands of public datasets, downloadable

You getA real hosted Postgres database with an auto-generated API

You getThe Spark plan: a hosted database, authentication and hosting at small scale

You getRate-limited API access for non-commercial projects

You getA monthly free allowance per service — commonly 10,000 calls on the core APIs

You getNothing for new developers

Every data & apis listing, answering the same questions. Values are deliberately qualitative — exact allowances change too often to publish honestly.

Service	Card required	Free ceiling	API key needed	Bulk download	Commercial use	Self-hostable	Sleeps when idle
Wikidata & Wikimedia dumps	No	Unlimited	No	Yes	Allowed	Yes	Never
data.gov	No	Unlimited	Sometimes	Yes	Allowed	Yes	Never
OpenAlex	No	Rate limited	No	Yes	Allowed	Yes	Never
OpenStreetMap	No	Rate limited	No	Yes	Share-alike	Yes	Never
Common Crawl	No	Unlimited	No	Yes	Allowed	Yes	Never
Open-Meteo	No	Rate limited	No	Yes	Non-commercial only	Yes	Never
Hugging Face Datasets	No	Rate limited	Sometimes	Yes	Varies by dataset	Yes	Never
Supabase	No	Monthly quota	Yes	Yes	Allowed	Yes	Yes
Firebase	No	Monthly quota	Yes	Yes	Allowed	No	Never
Reddit API	No	Rate limited	Yes	No	Not allowed	No	Never
Google Maps Platform	Yes	Per-service caps	Yes	No	Allowed	No	Never
X (Twitter) API	Yes	None — paid only	Yes	No	Allowed	No	Never