Data & Knowledge

Scores US land parcels for off-grid, rural or investment suitability using solar, water and flood data.

Predicts a likely age for a first name from statistics on roughly a billion people.

Colombia reference data: departments, cities, tourist sites, airports, presidents and more.

Bible text API covering many translations and languages, with book, chapter, verse and search endpoints.

One free key unlocks 450+ US federal agency APIs (NASA, NOAA, FDA, and more).

Single API for 35+ Swedish agencies: weather, statistics, transport, companies, parliament and more.

Argentine holidays, inflation, interest rates, and Congress voting data from public sources.

Searches and retrieves metadata for millions of physics, math, CS and related research preprints.

UK MPs, parties, Commons voting records and Early Day Motions, built on official Parliament data.

Full text and structure of British Columbia's statutes, regulations and municipal bylaws as XML.

Bible verses and passages as JSON, by reference or at random, across many translations.

Daily-rebuilt index of open EU public procurement tenders from TED, searchable by country and CPV sector.

Semantic search, filtering, sorting, and recommendations across millions of books.

List prices for major cloud data warehouses (BigQuery, Snowflake, Redshift, etc.) with history.

Looks up Telegram bots by username, returning category, star rating, and community votes.

Brazilian public data lookups: postal codes, company registry (CNPJ), banks, holidays, DDD codes and more.

Brazil's central bank open data: intraday PTAX exchange rates, interest rates, institution registries.

Brazilian federal deputies, bills, votes, committees, sessions, and parliamentary expense records.

Building permits, licences, zoning, inspections and contractor records from 55 Canadian cities.

Looks up US amateur radio callsigns against current FCC license data, with license and address details.

US Census Bureau demographic, economic and geographic data (ACS, decennial census, and more) by area.

Full texts and metadata for pre-modern Chinese philosophy, history and literature works.

City of Gdańsk open data portal: live road-weather sensors, demographics, budgets and more via CKAN's API.

City of Gdynia open data: demographics, utilities and municipal indicator datasets via a CKAN datastore API.

Over 500 open datasets on Nantes Métropole — public markets, transit, environment, civic data.

City of Toronto's CKAN data catalogue: transit, housing, health, safety and civic datasets via REST API.

Live election results, race calls and candidate vote counts for races worldwide, no key needed.

Looks up Brazilian companies by CNPJ using official Receita Federal registry data, no key.

30-year net present value and lifetime ROI for 500 US colleges and 134 majors, from IPEDS/FREOPP/BEA data.

U.S. college and university data: costs, admissions, graduation rates, student outcomes, by school or program.

Colorado state government's Socrata data portal with hundreds of queryable public datasets via the SODA API.

UK company registry lookups: officers, filings, addresses and status for registered companies.

Spanish IAE/CNAE tax activity code lookup and crosswalk, sourced from AEAT, INE and BOE.

Search and metadata for 200M+ open-access research papers aggregated from repositories worldwide.

Search and fetch metadata for scholarly works by DOI, title, author, funder, or journal.

Cyprus's national open data catalog: government datasets with per-dataset DCAT JSON/XML exports.

US Census/government data — population, jobs, education, industry — queryable by state and year.

Search Western Australian public-sector open datasets — transport, environment, health, planning.

Portal of thousands of individually keyed Korean government Open APIs covering weather, transit, and more.

Searches metadata for the U.S. government's catalog of public datasets.

Belgium's federal open-data catalog metadata as linked-data triples, via a Triple Pattern Fragments server.

CKAN catalog API for Ireland's open-data portal, listing and searching government datasets.

Search and read thousands of UK government datasets (crime, transport, health, environment) via CKAN.

Finds words matching meaning, sound, spelling pattern or related-word constraints for language tools.

Canadian water-quality monitoring data: sample locations, observations, and dataset metadata via OData.

Query thousands of Victorian government datasets (transport, planning, environment) via CKAN.

CKAN catalog API for Italy's open-data portal, listing and searching government datasets.

Catalog and metadata API for Spain's public-sector open data, over 116,000 government datasets.

German election poll results by party, institute and parliament, updated as new polls are entered.

US state voter registration deadlines plus online and same-day registration rules for each election.

Search API for German Bundestag legislative proceedings, motions, printed matter and speakers.

Looks up US school districts and schools by address, with enrollment, spending and boundary data.

Aggregated macroeconomic time-series data (GDP, inflation, trade) from statistics offices worldwide.

Search and retrieve Indian court case records, orders, cause lists and judge/advocate directories.

Normalized JSON for SEC filings, SAM.gov contracts, USAspending awards and congressional stock trades.

Search Brazilian public-procurement notices (PNCP) with deadlines, converted into readable Markdown documents.

Looks up emoji metadata by name: keywords, category, platform shortcodes and skin-tone variants.

Search European and worldwide patent bibliographic, full-text and legal-status data from the EPO.

Search abstracts and full text of biomedical and life-science research literature.

FBI's most-wanted and seeking-information cases, with photos, descriptions and reward details.

Search and fetch daily US federal rules, proposed rules, notices and executive orders.

English word definitions, phonetics, parts of speech, examples and synonyms, no key needed.

Full-text archive of classical Persian poets and poems, with search, categories, and random-poem lookup.

Aggregates UK/EU government tenders, planning, sanctions and other public records as JSON

Predicts likely gender for a first name using a database of over 1 billion people.

Germany's official statistics database covering economy, population and society via a REST/JSON web service.

Bilingual Web3 lesson index, glossary lookups, search, and role-based learning paths, with source citations.

Searches Google's book catalog for metadata, previews and availability by title, author or ISBN.

Searchable metadata for 79,000+ Project Gutenberg ebooks: titles, authors, subjects and download links.

Standard CKAN API over thousands of open humanitarian and crisis-response datasets from UN OCHA.

Source-cited datasets on German/EU AI procurement, budgets, court rulings, regulators and public AI systems.

Brazil's statistics agency: geographic divisions, census counts, and aggregated economic indicators.

Aggregates weather, air quality, traffic, transit, and civic data for 84 German cities.

Searches high-energy physics literature, authors, institutions, conferences and datasets.

Wayback Machine snapshots and Archive.org item metadata/search from the Internet Archive nonprofit.

Istanbul municipality datasets on transit, traffic, environment and city services, queryable or downloadable.

Searches and downloads community-uploaded machine learning datasets, notebooks, and competitions.

Free keyless REST API for daily Indian mandi (wholesale crop) prices across 5 states, from data.gov.in.

Word definitions, etymology, audio pronunciation and thesaurus data from Merriam-Webster's reference works.

Looks up appliance/equipment error codes by brand and code, returning cause and replacement part SKUs.

Predicts gender and confidence from a first name, full name, email address, or username.

Search astronomy and physics research literature: paper metadata, abstracts, and citation data.

SPARQL access to the Czech Republic's national catalog of open government datasets.

Estimates a person's likely nationality (ranked country probabilities) from their first name.

Looks up a French company's SIRET/SIREN in the DGFiP e-invoicing platform registry.

Structured records of every Nobel Prize and laureate since 1901, including bios and citations.

Answers number-theory questions (prime, palindrome, factors), converts bases and spells numbers out.

Live queries against NYC's public Socrata datasets (311 requests, housing, transit, budget, etc).

City of Minneapolis GIS and civic datasets (fires, crime, permits, etc.) via ArcGIS FeatureServer queries.

Umeå municipality's open-data catalog: 330+ datasets on climate, environment, city services and stats.

Searches and retrieves metadata for Canada's federal open-government dataset catalog via CKAN.

Queryable government datasets for the ACT (Canberra) region: environment, transport, parks and civic data.

Argentina's official open-data portal, with a time-series API for economic, energy and social indicators.

Standard CKAN API to search and retrieve metadata for 140,000+ Australian government datasets.

CKAN API to list and query open datasets published by Danish municipalities and regions.

REST API to search and read France's national open-data catalog (datasets, organizations, reuses).

Search and read metadata for Germany's open government datasets via CKAN, RDF, Turtle or JSON-LD.

Search and read metadata for Greece's open government datasets via the CKAN action API.

Kazakhstan's open-data portal API for government datasets such as crime records, queried with an API key.

Luxembourg's official open-data catalog: search, filter and download 3,000+ government datasets.

Malaysia's official open-data API covering statistics, fuel prices, weather and transit, no key needed.

Mexico's national statistics API: economic, demographic and geographic indicators by state and municipality.

CKAN metadata search over 20,000+ Dutch government datasets: packages, resources, organizations.

NZ Government open dataset catalog covering agencies, councils and Crown entities.

Norway's central catalog of public datasets, concepts and APIs contributed by government and private bodies.

Peru's national open data portal: thousands of government datasets queryable via a CKAN-style API.

Poland's national open-data catalog API: search and fetch metadata for 27,000+ government datasets.

Queensland Government's CKAN data catalog: search and pull 188,000+ public datasets by keyword.

Slovenia's CKAN-based government open-data catalog: search, list, and download datasets from public bodies.

South Australia's open-data portal: government datasets on demographics, health and environment via CKAN.

Statistics Sweden's official statistical database API: population, economy, labour market and more.

Book, edition, author and cover data crowdsourced by the Internet Archive; free lookups by ISBN or title.

Free, CC-BY-licensed directory of US scholarships and student aid, currently covering Nevada.

Read and manage public research projects, preprints, files and metadata on the OSF repository.

Open index of 250M+ scholarly works, authors, institutions, journals and research topics.

Company registry data (officers, filings, addresses) sourced from official registers in many countries.

CKAN-based search over ~16,000 Swiss federal, cantonal, and municipal open datasets.

Campaign finance data: candidates, committees, donations, and spending in US federal elections.

Search Spanish company registry (BORME) filings, corporate profiles and officer data.

Definitions, pronunciations, synonyms and translations from Oxford's dictionary data, by word lookup.

African macroeconomic, demographic and income-distribution indicators, 2000–2035, by country and region.

Searches a fixed collection of public-domain poems by author, title, or line, returning JSON.

Harry Potter books, characters, houses and spells, in six languages, with images.

Searches Canadian federal and provincial government tenders, contracts, and awards back to 2008.

US school, hospital and federal agency figures as JSON/CSV, each one sourced and dated.

Random English words with Wiktionary-sourced definitions, filterable by part of speech, tags, length.

Canadian elected representatives and electoral boundaries, searchable by postal code or address.

Right-to-disconnect employment law status, statutes and sanctions for all 27 EU countries.

Resolves DOI, PMID, ISBN and arXiv IDs into formatted citations, exports, and fabrication/retraction checks.

Jewish text library API: Torah, Talmud and commentary text, versions, and cross-reference links.

Search and retrieve papers, authors and citation graphs across 200M+ scholarly works.

Aggregated metadata about research releases, datasets and preprints from many source registries.

The SODA query API behind hundreds of government and NGO open-data portals, for filtering tabular datasets.

Open urban-planning datasets for Sofia: addresses, air quality, archaeology, land use and more.

Aggregates 335+ economic, health and social indicators for 218 countries from IMF, World Bank, and WHO.

Details on Stephen King's novels, short stories, and villains, including publisher and page counts.

Looks up synonyms, antonyms and a short definition for an English word, in XML or JSON.

UK official public record: company insolvency, wills/probate, appointments, honours notices as linked data.

Daily AI-modelled UK fertiliser price estimates (GBP/tonne) for nine grades, plus history and market data.

Searches Australia's National Library archive of digitised newspapers, books, images, and records.

Tracks amendment history of UK legislation provisions, sourced from legislation.gov.uk.

UK street-level crime, stop-and-search, neighbourhood teams and police-force data by location.

UK university and course data (demographics, ratings, popularity, value) from HESA and government statistics.

Searchable directory of world university names, countries, and official email domains.

Course, programme, and schedule data for University of Oslo, published under an open-data licence.

Full-text and semantic search over the Urantia Book papers, sections and paragraphs, with audio.

Live and historic readings from Newcastle's urban sensors: traffic, weather, air quality and buildings.

U.S. federal spending data: contracts, grants, agency budgets and award recipients from the DATA Act.

US patent and trademark filings, examination status, PTAB decisions, and ownership assignment records.

US election win-probability forecasts, congressional records and pollster accuracy ratings.

Structured facts and relationships about people, places and concepts from Wikimedia's public knowledge base.

Full-text article content, search, metadata and page history from Wikipedia and other wikis.

Wikimedia's collaborative dictionary: word definitions, etymologies, and translations by page title.

Fan-curated Harry Potter data: houses, elixirs, spells, wizards, and ingredients.

Computational answer engine returning direct answers, data, and visualizations for math and factual queries.

Texts, audiobooks and metadata for Polish public-domain literature, browsable by author, epoch and genre.

English word definitions, synonyms, examples and audio pronunciations from five dictionaries.

Definitions, synonyms, antonyms, rhymes and word relationships for over 150,000 English words.

Global development, economic, and social indicators by country and year, back decades.