Top 10 Free APIs to Build Profitable Side Projects As a developer, you're constantly looking for ways to create innovative and profitable side projects. One of the most effective ways to do this is by leveraging free APIs. In this article, we'll explore the top 10 free APIs that you can use to build profitable side projects, along with practical steps and code examples to get you started. 1. OpenWeatherMap API The OpenWeatherMap API provides current and forecasted weather conditions for locations all over the world. You can use this API to build a weather app or integrate it into an existing project. import requests api_key = " YOUR_API_KEY " city = " London " url = f " http://api.openweathermap.org/data/2.5/weather?q= { city } &appid= { api_key } " response = requests . get ( url ) weather_data = response . json () print ( weather_data ) Enter fullscreen mode Exit fullscreen mode You can monetize a weather app by displaying ads or offering in-app purchases for premium features. 2.…