Data & Knowledge
Reference data for your apps: country facts, Wikipedia summaries, books by ISBN, English definitions and synonyms, universities worldwide, tech news, airports and airlines, and public holidays.
8 APIs
Every country's capital, population, area, currency, calling code, languages, continent and neighbours — by code, name or currency.
Search Wikipedia in 300+ languages, get article summaries with images, 'on this day' events, random articles and autocomplete.
Search millions of books by title, author or subject, look up any ISBN, and find authors — powered by Open Library.
English definitions, synonyms, antonyms, rhymes, 'words that mean…' and autocomplete — fast and fully offline.
Search universities in 200+ countries, look up a university by web domain, and verify student email addresses.
Top, new and best tech stories from Hacker News, full-text news search, story details with comments, and Ask/Show HN.
Look up airports and airlines worldwide by IATA/ICAO code or name — location, type, elevation, country, call sign and more.
Public holidays for 150+ countries — including Indian states — plus 'is it a holiday?', upcoming holidays and working-day counts.
More collections
Made for India
IFSC, GSTIN, UPI, Indian holidays, Hindi OCR and more.
Validation & Verification
Check emails, phones, payment details and passwords before you trust them.
Image, Video & Documents
Remove backgrounds, resize images, process video, read text and codes.
Health, Science & Weather
Medicines, nutrition, fitness, earthquakes, weather and maths.
Free APIs
APIs with a free plan — no card needed to start.
Popular APIs
The APIs developers on APIHiver actually call the most.