Search the Art Institute of Chicago's public collection by keyword. Returns title, artist, date, medium, place of origin, department, public-domain status, artwork page and IIIF image URL. Filter to public-domain works only. Free official API, no key.
Search 500,000+ clinical studies on ClinicalTrials.gov by condition, intervention/drug, keyword and recruitment status. Returns NCT ID, title, phase, status, sponsor, enrollment, start/completion dates, countries and the study link. Official free API, no key needed.
Get current prices and market data for any list of cryptocurrencies in bulk: price in USD/KRW/EUR and more, market cap, 24h volume, 24h/high/low change, and circulating supply. Uses the free public CoinGecko API - no API key needed for this data.
Look up definitions for any list of English words in bulk: part of speech, one or more plain-text definitions per sense, and example sentences where Wiktionary has them. Uses the free, official Wiktionary REST API (Wikimedia) - no API key needed.
Query the NASA Exoplanet Archive for confirmed planets. Filter by name, discovery method and discovery year. Returns planet, host star, discovery year and method, orbital period, radius and mass (Earth units), star distance and archive link. Free public data, no API key.
Get NOAA tide predictions for a US tide station: high and low tide time and water height for a date range. Choose metric or English units. Useful for fishing, boating, surf, coastal apps and marine planning. Free official NOAA CO-OPS API, no key.
Search official Nobel Prize data by year range and category (physics, chemistry, medicine, literature, peace, economics). Returns award year, category, date awarded, prize amount (nominal and inflation-adjusted), laureate names and the official motivation. Free open data (CC0), no API key.
Extract link-preview metadata for any list of URLs in bulk: Open Graph and Twitter Card tags (title, description, image, type, site name), plain <title>/<meta description>, canonical URL and favicon. The same data Slack, Discord and social platforms use to build a link preview card.
Bulk-resolve chemical names to PubChem records. Returns CID, molecular formula, molecular weight, IUPAC name, SMILES, InChIKey and the PubChem page link. Ideal for chemistry, pharma and materials data enrichment. Free public-domain NCBI data, no key.
Search PubMed (NCBI) for biomedical and life-science papers by keyword or PubMed query syntax. Returns PMID, title, authors, journal, publication date, DOI, PMC ID, article types and links. Uses the official free NCBI E-utilities API, no key required.
Get earthquake events from the official USGS Earthquake Catalog: filter by date range, minimum magnitude, and radius around any coordinates. Returns magnitude, location, time, depth, coordinates, tsunami flag, felt reports and event links. Free public-domain data.
Check whether any URL has been archived by the Internet Archive Wayback Machine: closest snapshot date, direct archived link, and (optionally) the full list of known snapshot timestamps. Uses the free, official archive.org API - no API key needed.
Get the daily top viewed Wikipedia articles for any language edition and date (from the official Wikimedia pageviews API). Returns rank, article title, views and link. Perfect for trend research, content ideas and news monitoring. Free official data, no key needed.
Get metadata for any list of public YouTube videos in bulk: title, channel name and URL, thumbnail image and ready-to-use embed HTML. Uses the official YouTube oEmbed endpoint - no API key and no quota limit, unlike the YouTube Data API.
Search Zenodo, CERN's open repository, by keyword and record type. Returns title, DOI, creators, resource type, publication date, license, access status, keywords, views/downloads and the record link. Free public API, no key.
Look up any number of Docker Hub repositories (nginx, bitnami/redis, ...) and get pull counts, stars, last updated/registered dates, categories, storage size and links. Track image popularity and maintenance. Uses Docker Hub's public repository API, no key needed.
Search FDA drug labels (SPL) by brand name, generic name, manufacturer or substance via the official openFDA API. Returns active ingredients, indications, warnings, dosage text, route, manufacturer, label version and DailyMed link. Free public data, no key needed.
Search the GBIF taxonomic backbone for animals, plants, fungi and more by name. Returns scientific and common names, rank, taxonomic status, full classification (kingdom to genus), IUCN threat status, habitats and number of recorded occurrences. Free open data.
Look up who owns any list of IPv4/IPv6 addresses with official RDAP data: network name, handle, CIDR blocks, address range, country, registry status and registration dates. Great for security investigations, abuse reports and traffic analysis. No key needed.
Get clean reference data for any countries: ISO2/ISO3 codes, name, region, income level, lending type, capital city and coordinates, straight from the official World Bank country API. Ideal for enriching datasets, dropdowns and geo analyses. Free official data.