Data.gov Catalog API
FreeDegradedNot yet verified
Searches metadata for the U.S. government's catalog of public datasets.
Example request
curl -s 'https://api.gsa.gov/technology/datagov/v4/search?q=climate&api_key=DEMO_KEY'
Free tier, in plain English
Free for everyone after a quick self-serve signup; a shared DEMO_KEY also works for light testing without registering.
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