Top 10 Free APIs to Build Profitable Side Projects

As a developer, building side projects can be a great way to earn extra income, showcase your skills, and gain experience. One of the most important components of any project is the API, which provides the data and functionality needed to bring your idea to life. In this article, we'll explore the top 10 free APIs that you can use to build profitable side projects.

1. OpenWeatherMap API

The OpenWeatherMap API provides current and forecasted weather conditions, which can be used to build a weather app or integrate weather data into an existing application. You can sign up for a free API key on the OpenWeatherMap website and make up to 60 requests per minute.

import requests

api_key = "YOUR_API_KEY"
city = "London"

response = requests.get(f"http://api.openweathermap.org/data/2.5/weather?q={city}&appid={api_key}")
weather_data = response.json()

print(weather_data)

2. Google Maps API

The Google Maps API provides maps, directions, and places data, which can be used to build a mapping application or integrate maps into an existing application. You can sign up for a free API key on the Google Cloud website and make up to 2,500 requests per day.

const api_key = "YOUR_API_KEY";
const map = new google.maps.Map(document.getElementById("map"), {
  center: { lat: 37.7749, lng: -122.4194 },
  zoom: 12,
});

const service = new google.maps.places.PlacesService(map);
service.nearbySearch(
  {
    location: { lat: 37.7749, lng: -122.4194 },
    radius: 1000,
    type: ["restaurant"],
  },
  (results, status) => {
    if (status === google.maps.places.PlacesServiceStatus.OK) {
      results.forEach((result) => {
        console.log(result);
      });
    }
  }
);

3. NewsAPI

The NewsAPI provides news articles from around the world, which can be used to build a news aggregator or integrate news data into an existing application. You can sign up for a free API key on the NewsAPI website and make up to 100 requests per day.

import requests

api_key = "YOUR_API_KEY"
country = "us"

response = requests.get(f"https://newsapi.org/v2/top-headlines?country={country}&apiKey={api_key}")
news_data = response.json()

print(news_data)

4. GitHub API

The GitHub API provides data about GitHub users, repositories, and issues, which can be used to build a GitHub client or integrate GitHub data into an existing application. You can sign up for a free API key on the GitHub website and make up to 5,000 requests per hour.

import requests

api_token = "YOUR_API_TOKEN"
username = "facebook"

response = requests.get(f"https://api.github.com/users/{username}", headers={"Authorization": f"Bearer {api_token}"})
user_data = response.json()

print(user_data)

5. Spotify Web API

The Spotify Web API provides data about music, artists, and albums, which can be used to build a music streaming application or integrate music data into an existing application. You can sign up for a free API key on the Spotify website and make up to 50 requests per second.

python
import requests

client_id = "YOUR_CLIENT_ID"
client_secret = "YOUR_CLIENT_SECRET"

response = requests.post(
  "https://accounts.spotify.com/api/token",
  headers={"Content-Type": "application/x-www-form-urlencoded"},
  data={"grant_type": "client_credentials"},
  auth=(client_id, client_secret),
)

access_token =