The Ultimate List of Free APIs
As a developer, APIs are your gateway to enriching your apps with external data, services, and features. Whether you're building a web app, mobile app, or even integrating powerful tools like AI and machine learning, APIs can streamline the development process.
Pro tip: Managing, testing, and integrating APIs can often be a complicated process. Apidog simplifies these tasks by offering a comprehensive suite of features designed for developers.
Here’s a breakdown of some of the most valuable free APIs available for developers:
| Category | API Name | Description | Link |
| Public APIs for Open Data | OpenStreetMap | Open map data for geolocation. | OpenStreetMap API |
| NASA API | Space data, images, and mission information. | NASA API | |
| Data.gov | U.S. government open datasets. | Data.gov | |
| World Bank API | Economic and country-level data. | World Bank API | |
| UN Data API | Access global development data. | UN Data | |
| CovidActNow API | COVID-19 risk and vaccine data. | CovidActNow API | |
| GeoNames API | Geographic location and postal data. | GeoNames API | |
| Open Library API | Books, covers, and library metadata. | Open Library | |
| Weather APIs | OpenWeatherMap | Weather data and forecasts. | OpenWeatherMap |
| WeatherAPI | Real-time weather and historical data. | WeatherAPI | |
| Storm Glass API | Marine and coastal weather data. | Storm Glass | |
| Visual Crossing | Historical weather and analytics. | Visual Crossing | |
| Weatherbit API | Forecasts and real-time data. | Weatherbit | |
| News APIs | NewsAPI | Aggregates news headlines globally. | NewsAPI |
| GNews API | Real-time global news updates. | GNews API | |
| The Guardian API | Access The Guardian's articles and content. | The Guardian API | |
| Currents API | Breaking news and trending stories. | Currents API | |
| New York Times API | Fetch NYT articles, archives, and metadata. | NYT API | |
| Finance & Cryptocurrency APIs | CoinGecko API | Crypto market and exchange data. | CoinGecko API |
| Alpha Vantage | Stock and forex data. | Alpha Vantage | |
| Fixer API | Foreign exchange rates. | Fixer API | |
| Nomics API | Crypto asset prices and information. | Nomics API | |
| Finnhub API | Stock API for real-time financial data. | Finnhub API | |
| AI & NLP APIs | OpenAI API | Access GPT models for text generation. | OpenAI API |
| DeepAI | AI-powered tools for analysis and generation. | DeepAI | |
| Wit.ai | NLP for building voice apps. | Wit.ai | |
| TensorFlow.js | JavaScript AI models and training. | TensorFlow.js | |
| Clarifai API | AI for image recognition and tagging. | Clarifai API | |
| Education APIs | Khan Academy API | Access learning resources and videos. | Khan Academy |
| OpenAI Datasets | Learning datasets for AI and development. | OpenAI Datasets | |
| Edamam API | Nutrition and education content. | Edamam API | |
| RestCountries | Get country details for education. | RestCountries API | |
| Google Books API | Search books and retrieve data. | Google Books | |
| Sports APIs | Football-Data.org | Football and league data. | Football Data |
| TheSportsDB API | Sports teams, players, and scores. | TheSportsDB | |
| NBA API | Stats and information for NBA games. | NBA API | |
| Api-Football | Live scores and football updates. | API Football | |
| ESPN API | Sports data for major events. | ESPN API | |
| More Free APIs | NASA API | Space data, images, and videos. | NASA API |
| Open Trivia Database API | Trivia questions for quiz apps. | OpenTDB API | |
| Time Zone DB | Fetch time data for regions worldwide. | Time Zone DB API | |
| Unsplash API | High-quality images for your app. | Unsplash API | |
| QR Code Generator API | Create QR codes for any data. | QR API | |
| Advice Slip API | Fetch random pieces of advice. | Advice Slip API | |
| Brevo API | SMS, campaign, and form generation services. | Brevo API | |
| Marvel API | Marvel Comics data, characters, and more. | Marvel API | |
| Giphy API | Access thousands of GIFs and stickers. | Giphy API | |
| Dictionary API | Word definitions, antonyms, and synonyms. | Dictionary API | |
| OCR Space API | Optical character recognition for text extraction. | OCR API | |
| FourSquare API | Location data and user-generated content. | Foursquare API | |
| Telegram Bot API | Create bots for Telegram messaging platform. | Telegram Bot API | |
| Slack API | Build apps for team collaboration. | Slack API | |
| Wolfram Alpha API | Knowledge and computational data. | Wolfram API | |
| Open Library API | Access metadata for millions of books. | Open Library API | |
| Oxford Dictionary API | Access word definitions and synonyms. | Oxford Dictionary API | |
| URL Scan API | Scan and analyze URLs for phishing or malware. | URL Scan API | |
| Free Forex API | Real-time forex and cryptocurrency rates. | Free Forex API | |
| Sunrise_Sunset API | Fetch sunrise and sunset times for any location. | Sunrise Sunset API | |
| Link Preview API | Fetch preview data for URLs such as title, description, and images. | Link Preview API | |
| Fun Translation API | Text translation into fun languages (e.g., Yoda-speak). | Fun Translation API |
Wrapping Up
With this comprehensive list of free APIs, you're equipped to build projects, apps, and tools using real-world data. These APIs can power your next innovative idea across various domains.