Top 38 Open Data APIs For Developers - Public APIs

18F - Unofficial US Federal Government API Development
API Setu - An Indian Government platform that provides a lot of APIS for KYC, business, education & employment
Archive.org - The Internet Archive
ArgentinaDatos - Unofficial Argentinian data API
Black History Facts - Contribute or search one of the largest black history fact databases on the web
BotsArchive - JSON formatted details about Telegram Bots available in database
Callook.info - United States ham radio callsigns
CARTO - Location Information Prediction
CollegeScoreCard.ed.gov - Data on higher education institutions in the United States
DataStream - An open access platform for sharing Canadian water quality data
Enigma Public - Broadest collection of public data
French Address Search - Address search via the French Government
GENESIS - Federal Statistical Office Germany
Joshua Project - People groups of the world with the fewest followers of Christ
Kaggle - Create and interact with Datasets, Notebooks, and connect with Kaggle
LinkPreview - Get JSON formatted summary with title, description and preview image for any requested URL
Lowy Asia Power Index - Get measure resources and influence to rank the relative power of states in Asia
Microlink.io - Extract structured data from any website
Nasdaq Data Link - Stock market data
Nobel Prize - Open data about nobel prizes and events
Open Data Minneapolis - Spatial (GIS) and non-spatial city data for Minneapolis
openAFRICA - Large datasets repository of African open data
OpenCorporates - Data on corporate entities and directors in many countries
OpenSanctions - Data on international sanctions, crime and politically exposed persons
Recreation Information Database - Recreational areas, federal lands, historic sites, museums, and other attractions/resources(US)
Scoop.it - Content Curation Service
Socrata - Access to Open Data from Governments, Non-profits and NGOs around the world
Sofiaplan - Access to urban research data for the Bulgarian capital Sofia
Teleport - Quality of Life Data
Umeå Open Data - Open data of the city Umeå in northern Sweden
UniDb - Data that helps people gain useful insight into universities in the United Kingdom
Universities List - University names, countries and domains
University of Oslo - Courses, lecture videos, detailed information for courses etc. for the University of Oslo (Norway)
UPC database - More than 1.5 million barcode numbers from all around the world
Urban Observatory - The largest set of publicly available real time urban data in the UK
Wikidata - Collaboratively edited knowledge base operated by the Wikimedia Foundation
Wikipedia - Mediawiki Encyclopedia
Yelp - Find Local Business