List of Free Public APIs with Documentation and Coding Examples

1. Weather

• OpenWeatherMap API

  • Description: Provides weather data, including current conditions, forecasts, and historical data.
  • Coding Example: OpenWeatherMap API Documentation

• Weatherstack API

  • Description: Real-time weather data for any location in the world.
  • Coding Example: Weatherstack API Documentation

2. Finance

• Alpha Vantage API

  • Description: Provides real-time and historical stock market data.
  • Coding Example: Alpha Vantage API Documentation

• CoinGecko API

  • Description: Provides cryptocurrency data including price, volume, market cap, and more.
  • Coding Example: CoinGecko API Documentation

3. Data & Utilities

• Public APIs Directory

  • Description: A directory of free and public APIs across various categories.
  • Coding Example: Not applicable (directory of APIs)

• JsonPlaceholder API

  • Description: Provides fake online REST API for testing and prototyping.
  • Coding Example: JsonPlaceholder API Documentation

4. Geography & Mapping

• OpenCage Geocoding API

  • Description: Provides geocoding and reverse geocoding services.
  • Coding Example: OpenCage API Documentation

• RestCountries API

  • Description: Provides information about countries, such as population, capital, flag, and more.
  • Coding Example: RestCountries API Documentation

5. Social Media & News

• NewsAPI

  • Description: Provides access to news headlines and articles from various sources.
  • Coding Example: NewsAPI Documentation

• Twitter API

  • Description: Allows access to Twitter data including tweets, user profiles, and more.
  • Coding Example: Twitter API Documentation

6. Health

• Nutritionix API

  • Description: Provides nutrition data for various foods.
  • Coding Example: Nutritionix API Documentation

• OpenFDA API

  • Description: Provides public access to high-value FDA data, including information on drugs, devices, and foods.
  • Coding Example: OpenFDA API Documentation

7. Science & Education

• Open Notify API

  • Description: Provides information about the International Space Station's location and astronauts currently in space.
  • Coding Example: Open Notify API Documentation

• Federal Register API

  • Description: Provides access to Federal Register documents, including regulations, proposed rules, and notices.
  • Coding Example: Federal Register API Documentation

• Open Data DC API

  • Description: Provides access to various datasets from the District of Columbia, including public safety, health, and more.
  • Coding Example: Open Data DC API Documentation

• World Bank API

  • Description: Provides access to a wide range of World Bank economic, financial, and social data.
  • Coding Example: World Bank API Documentation

• Google Civic Information API

  • Description: Provides political information, such as election data, polling places, and representatives.
  • Coding Example: Google Civic Information API Documentation