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Preprints, working papers, and event content from Cambridge University Press's Open Engage platform, with subjects, communities, events, and authors.

Climate and environment indicators for all countries from the World Bank Open Data — CO2 emissions, renewable energy, forest area, access to electricity, and more.

Public libraries across the United States, sourced from Wikidata.

Active and historically active volcanoes worldwide from the Smithsonian Global Volcanism Program — eruption histories, locations, and classifications.

Significant earthquakes (magnitude 4.5+) worldwide from the USGS Earthquake Hazards Program, with seismic network sources and tectonic regions.

Artworks and artists from the Tate galleries (Tate Britain, Tate Modern, Tate Liverpool, Tate St Ives).

Universities and higher education institutions from 201 countries worldwide.

World flags with country codes, flag emoji, flag images, region, capital, population, and independence status.

Major world cities with population, coordinates, timezone, and notable characteristics.

SI and common measurement units with conversion factors — length, mass, volume, temperature, speed, energy, pressure, area, and more.

Superhero data including powerstats, appearance, biography, and connections from the SuperHero API.

All 118 chemical elements with atomic properties, classifications, electron configurations, and discovery information.

All 63 US national parks with locations, establishment dates, areas, visitor counts, and regional classifications.

Major world languages with ISO 639 codes, language families, writing scripts, and approximate speaker counts.

All HTTP response status codes from the IANA registry — informational, success, redirection, client error, and server error classes.

Dog breeds with physical characteristics, temperament, breed groups, and images from TheDogAPI.

ISO 4217 currency codes, names, symbols, and country associations for all active world currencies.

World countries with ISO 3166 codes, capitals, regions, currencies, languages, calling codes, and time zones.

All 148 CSS named colors with hex, RGB, and HSL values, grouped by color family.

Cat breed data from TheCatAPI — breed characteristics, temperament, origins, and trait scores.

Generation 1 Pokemon data — stats, types, abilities, and species info from the PokeAPI open RESTful API.

Trivia questions across multiple categories from the Open Trivia Database.

Food products sold in the United States from Open Food Facts — nutrition data, ingredients, brands, categories, and eco-scores.

Restaurant health inspections in Manhattan — restaurants, inspections, and violations from the NYC Department of Health and Mental Hygiene.

Dog licensing records from New York City — dog names, breeds, boroughs, and license dates from NYC Open Data.

Classic literature from Open Library — well-known novels, plays, and works spanning centuries.

US tide and current monitoring stations from NOAA's Center for Operational Oceanographic Products and Services (CO-OPS) — station metadata, tide predictions, and water levels.

Severe weather events across the United States from NOAA's Storm Events Database — tornadoes, hurricanes, floods, wildfires, and more with narratives and impact data.

Global tropical cyclone tracks from NOAA's International Best Track Archive (IBTrACS) — storms, basins, and sampled track points for the last 3 years.

Common chemical compounds from PubChem — molecular properties, structure identifiers, and classification for well-known molecules.

Clinical trials for Alzheimer's disease from ClinicalTrials.gov — studies, conditions, interventions, sponsors, and outcomes.

Breweries across the United States from Open Brewery DB — names, locations, types, contact information, and websites.

All Nobel Prize laureates from 1901 to present, with prize categories, years, and motivations.

Vehicle makes and models from NHTSA's vPIC (Vehicle Product Information Catalog) API, covering major manufacturers and recent model years.

Dinosaur species data — names, diets, geological periods, regions, taxonomy, and classification from open paleontology datasets.

Asteroids and comets that pass near Earth, from NASA's Center for Near Earth Object Studies (CNEOS) — orbital parameters, size estimates, and close approach data.

Confirmed exoplanets and their host stars from NASA's Exoplanet Archive, with discovery methods, facilities, and orbital parameters.

The Museum of Modern Art collection — 140K+ artworks spanning painting, sculpture, photography, architecture, design, film, and more.

Highlighted artworks from The Metropolitan Museum of Art's Open Access collection — paintings, sculptures, photographs, and more with artist, department, and geographic provenance.

Common Japanese vocabulary from JLPT N5 and N4 levels — words, readings, English definitions, and parts of speech sourced from the Jisho.org dictionary API (powered by JMdict).

Species conservation status data based on the IUCN Red List of Threatened Species, covering critically endangered, endangered, vulnerable, and near threatened species across mammals, birds, reptiles, amphibians, fish, and invertebrates.

Films from Studio Ghibli with directors, descriptions, and Rotten Tomatoes scores.

Bird species observed in North America from the Global Biodiversity Information Facility (GBIF) — species profiles, taxonomic classification, occurrence records, and contributing datasets.

Cocktail recipes, ingredients, categories, and glassware from TheCocktailDB -- names, instructions, measures, and ingredient details.