Free API

Free API List

In today's digital world, APIs (Application Programming Interfaces) are essential tools that allow developers to access data, services, and functionalities from various sources. Whether you're building a weather app, a travel site, or just looking to explore interesting data, there are numerous free APIs available to help bring your projects to life. In this blog, we'll explore a curated list of free APIs across different categories, with links and brief descriptions to get you started.

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1. Geolocation and IP Address APIs

Understanding where users are connecting from is fundamental for personalization and analytics.

• ipapi
  Provides detailed IP address information, including location, country, city, and more.
  Example: https://ipapi.co/8.8.8.8/json/

• ipinfo.io
  Offers IP geolocation data with easy-to-use JSON responses.
  Example: https://ipinfo.io/124.155.214.47/json

• ipwhois.app
  Simple IP geolocation service with additional network info.
  Example: https://ipwhois.app/json/8.8.8.8

• ip-api
  Fast and reliable IP geolocation data.
  Example: http://ip-api.com/json/8.8.8.8

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2. Trivia & Entertainment

Looking to add trivia questions or fun facts to your app?

• Open Trivia Database
  Fetch trivia questions of various types and difficulties.
  Example: https://opentdb.com/api.php?amount=1&type=multiple

• Useless Facts
  Random fun facts to entertain users or include in content.
  Example: https://uselessfacts.jsph.pl/api/v2/facts/random

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3. Weather Data

Get current weather conditions, forecasts, and historical weather data.

• Open-Meteo Current Weather (New York)
  Real-time weather data for New York City.
  Example: https://api.open-meteo.com/v1/forecast?latitude=40.7128&longitude=-74.0060&current_weather=true

• Open-Meteo Historical Data (Berlin)
  Historical temperature data for specific dates in Berlin.
  Example: https://archive-api.open-meteo.com/v1/archive?latitude=52.52&longitude=13.41&start_date=2022-01-01&end_date=2022-01-02&hourly=temperature_2m

• Singapore 2-hour Weather Forecast
  Short-term forecast data for Singapore.
  Example: https://api.data.gov.sg/v1/environment/2-hour-weather-forecast

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4. Location and Geographical Data

For mapping, distance calculations, or educational content.

• Google User Profile
  Retrieve information about a GitHub user, including location details.
  Example: https://api.github.com/users/google

• Weather for Singapore (Coordinates)
  Current weather for Singapore's coordinates.
  Example: https://api.open-meteo.com/v1/forecast?latitude=1.3521&longitude=103.8198&current_weather=true

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5. Educational Resources & Data

Access book info, university listings, and educational datasets.

• Open Library - Book Details (ISBN 0451526538)
  Get detailed info about a specific book via ISBN.
  Example: https://openlibrary.org/api/books?bibkeys=ISBN:0451526538&format=json&jscmd=data

• Open Library - Search for Harry Potter
  Find books matching your query.
  Example: https://openlibrary.org/search.json?q=harry+potter

• Singapore Universities
  List of universities in Singapore for educational or travel apps.
  Example: http://universities.hipolabs.com/search?country=Singapore

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6. Language & Translation

Add dictionary and translation capabilities.

• Dictionary API (English word "hello")
  Example: https://api.dictionaryapi.dev/api/v2/entries/en/hello

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7. Holidays & Events

Integrate public holiday data for scheduling and planning.

• Singapore Public Holidays 2026
  List of public holidays for Singapore in 2026.
  Example: https://date.nager.at/api/v3/PublicHolidays/2026/SG

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8. Government & Environmental Data

Monitor environmental conditions and government stats.

• Singapore PSI (Pollutant Standards Index)
  Air quality index data.
  Example: https://api.data.gov.sg/v1/environment/psi

• Weather Forecast (2-hour)
  Short-term weather predictions in Singapore.
  Example: https://api.data.gov.sg/v1/environment/2-hour-weather-forecast

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9. News & Media

Stay updated with the latest technology stories.

• Hacker News - Technology Stories
  Recent posts tagged with technology.
  Example: https://hn.algolia.com/api/v1/search_by_date?query=technology&tags=story

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10. Advice & Fun Facts

Add random advice or interesting facts to engage users.

• Random Advice
  Example: https://api.adviceslip.com/advice

• Random Useless Facts
  Example: https://uselessfacts.jsph.pl/api/v2/facts/random

• Random User Generator
  Generate fake user profiles for testing.
  Example: https://randomuser.me/api/

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Conclusion

The variety of free APIs available today means developers can enrich their applications without incurring costs. From geolocation to weather, education to entertainment, these APIs are powerful tools in building engaging, dynamic, and data-driven applications. Explore these resources, experiment with their features, and unlock new possibilities for your projects!

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Happy Coding! 🚀