Open Data
Free datasets and public APIs covering knowledge, science, economics and more.
JSON: /api/v1/directory.json (filter on category=open-data)
Wikidata
Free collaborative knowledge base of structured facts, queryable by SPARQL and a REST API.
FreeNo authWikipedia API
Read article text, summaries and search results from Wikipedia and sister projects without a key.
FreeNo authOpenStreetMap
Community-built world map data, downloadable or queryable through the Overpass API.
FreeNo authData.gov
Catalog of US federal open datasets with a CKAN-based search API.
FreeNo authSEC EDGAR
US company filings and financial facts as JSON; requires a descriptive User-Agent header.
FreeNo autharXiv API
Search and fetch metadata for millions of open-access preprints in science and maths.
FreeNo authOpenAlex
Open index of scholarly works, authors and institutions, with a generous free API.
FreeNo authOpen-Meteo
Keyless weather forecast and historical data API, free for non-commercial use.
FreeNo authWorld Bank Open Data
Development indicators for countries worldwide, available via a simple JSON API.
FreeNo authREST Countries
Simple API returning facts such as capitals, currencies and languages for every country.
FreeNo authNASA Open APIs
Free API key unlocks astronomy picture of the day, Mars rover photos, near-earth objects and more.
FreeAPI keyGDELT Project
Monitors global news in many languages and exposes searchable event and article data.
FreeNo authHugging Face Datasets
Hub of community datasets with a viewer API for browsing and downloading them.
FreeNo authFRED Economic Data
Hundreds of thousands of economic time series from the St. Louis Fed, free with an API key.
FreeAPI keyCrossref API
Metadata and DOIs for scholarly publications, handy for citation lookups.
FreeNo auth