50 Free APIs for Developers: Essential Tools for Web and App Development

🔍 General/Public APIs

1. Public APIs – https://api.publicapis.org/entries
2. REST Countries – https://restcountries.com
3. IPify – https://www.ipify.org/ (Get IP address)
4. Reqres – https://reqres.in/ (Mock API for testing)
5. JSONPlaceholder – https://jsonplaceholder.typicode.com

🌦️ Weather APIs

1. OpenWeatherMap – https://openweathermap.org/api
2. WeatherAPI – https://www.weatherapi.com/
3. MetaWeather – https://www.metaweather.com/api/
4. Weatherbit – https://www.weatherbit.io/api
5. Visual Crossing Weather – https://www.visualcrossing.com/weather-data-editions

📰 News APIs

1. NewsAPI – https://newsapi.org/
2. Currents API – https://currentsapi.services/en
3. ContextualWeb News API – https://rapidapi.com/contextualwebsearch/api/web-search
4. Mediastack – https://mediastack.com/
5. GNews API – https://gnews.io/

🧠 AI & ML APIs

1. OpenAI (Free tier) – https://platform.openai.com/
2. Hugging Face Inference API – https://huggingface.co/inference-api
3. IBM Watson – https://www.ibm.com/watson/products-services/
4. Aylien Text Analysis – https://aylien.com/text-api/
5. Twinword Text Analysis – https://www.twinword.com/api/

📈 Finance & Crypto

1. CoinGecko – https://www.coingecko.com/en/api
2. CoinAPI (Free tier) – https://www.coinapi.io/
3. ExchangeRate-API – https://www.exchangerate-api.com/
4. CurrencyFreaks – https://currencyfreaks.com/
5. Finnhub – https://finnhub.io/

🌐 Geolocation & Maps

1. IP-API – http://ip-api.com/
2. GeoJS – https://www.geojs.io/
3. PositionStack – https://positionstack.com/
4. OpenCage Geocoder – https://opencagedata.com/api
5. Google Maps (limited free tier) – https://developers.google.com/maps

📚 Education & Research

1. NASA APIs – https://api.nasa.gov/
2. Open Library – https://openlibrary.org/developers/api
3. Wikipedia API – https://www.mediawiki.org/wiki/API:Main_page
4. Harvard Art Museums – https://github.com/harvardartmuseums/api-docs
5. JokeAPI – https://jokeapi.dev/

🎮 Games & Fun

1. PokeAPI – https://pokeapi.co/
2. Board Game Atlas – https://www.boardgameatlas.com/api/docs
3. Trivia API – https://opentdb.com/api_config.php
4. Deck of Cards API – https://deckofcardsapi.com/
5. The Dog API – https://thedogapi.com/

🛒 E-commerce/Product APIs

1. Fake Store API – https://fakestoreapi.com/
2. Best Buy API – https://developer.bestbuy.com/
3. MercadoLibre API – https://developers.mercadolibre.com.ar/en_us/api-docs-en
4. Etsy API – https://developers.etsy.com/

📸 Media & Design

1. Unsplash API – https://unsplash.com/developers
2. Pexels API – https://www.pexels.com/api/
3. Giphy API – https://developers.giphy.com/
4. Pixabay API – https://pixabay.com/api/docs/
5. Lorem Picsum – https://picsum.photos/

🛠️ Developer Tools & Testing

1. Mocky – https://designer.mocky.io/ (Custom mock APIs for testing)