Explore Categories
Dive into the most active API ecosystems.
Development
120Userstack, 24 Pull Requests, Agify.io
Games & Comics
96Age of Empires II, AmiiboAPI, Animal Crossing: New Horizons
Geocoding
86IPstack, ipapi.com, Actinia Grass GIS
Government
86Bank Negara Malaysia Open Data, BCLaws, Brazil
Transportation
69ADS-B Exchange, airportsapi, AIS Hub
Cryptocurrency
64Coinlayer, 0x, 1inch
Finance
45Marketstack, Aletheia, Alpaca
Video
43An API of Ice And Fire, Bob's Burgers, Breaking Bad
Social
404chan, Ayrshare, aztro
Security
38Application Environment Verification, BinaryEdge, BitWarden
Open Data
3518F, API Setu, Archive.org
Music
337digital, AI Mastering, Audiomack
Zero-Config APIs
Perfect for prototypes. No authentication required.
Axolotl
⭐ Beginner's PickAxolotl API returns random photos and fun facts about axolotls (aquatic salamanders).
Cat Facts
⭐ Beginner's PickCat Facts delivers random, verified facts about cats via a simple REST API.
Cataas
Cataas provides programmatic access to cat as a service (cats pictures and gifs) via REST API.
Dog Facts
⭐ Beginner's PickDog Facts API returns random interesting facts about dogs as plain JSON.
Dog Facts
⭐ Beginner's PickThis Dog Facts API returns random dog facts in clean JSON with no API key required.
Dogs
⭐ Beginner's PickThe Dog CEO API serves random dog images from the Stanford Dogs Dataset, organized by breed.
FishWatch
⭐ Beginner's PickFishWatch by NOAA provides sustainability data, habitat info, and images for US fish species.
HTTP Cat
⭐ Beginner's PickHTTP Cat returns a cat-themed image for any HTTP status code via a simple URL pattern.
HTTP Dog
⭐ Beginner's PickHTTP Dog serves a photo of a dog for every HTTP status code (200, 404, 500, etc.), making it easy to visualize API responses in a fun way.
MeowFacts
⭐ Beginner's PickMeowFacts returns random, verified facts about cats such as their sleep habits, hunting instincts, and biological quirks.
Movebank
Movebank is a global database of animal movement and migration tracking data collected by GPS tags and sensors attached to wild animals worldwide.
PlaceBear
⭐ Beginner's PickPlaceBear generates placeholder bear images at any pixel dimensions you specify, making it easy to fill wireframes and mockups with visually interesting content during development.
API Recipes
All Recipes →Build a Rain Alert App
Get notified on your phone whenever rain is expected in your area. Combines weather forecasts with IP-based location detection and push notifications.
Build a Travel Budget Converter
Calculate how much your travel budget is worth in your destination's currency, auto-detecting your home currency from your IP location.
Build a News Sentiment Dashboard
Analyze sentiment of trending news articles in real-time. Visualize whether coverage of a topic is positive, negative, or neutral.
Build a Weather-Based Playlist Matcher
Get Spotify playlist recommendations based on the current weather. Sunny day? Upbeat tracks. Rainy afternoon? Chill vibes.
Build a GitHub Activity Digest
Get a daily email summary of activity across your GitHub repositories. Track new issues, pull requests, and stars.
Build a Recipe Nutrition Checker
Search for recipes and instantly see detailed nutritional information. Perfect for health-conscious meal planning.
Getting Started
All Tutorials →Your First Weather API Call
Learn to fetch weather data in 10 minutes. Get current temperature, humidity, and conditions for any city in the world.
Fetch Stock Prices with Alpha Vantage
Learn to retrieve real-time and historical stock market data. Build a simple stock price checker in 15 minutes.
Build a Random Quote Generator
Create a simple app that displays random inspirational quotes with a single click. No API key needed.
Get Your IP Address and Location
Learn how IP geolocation works by building a simple tool that finds your location from your IP address.
Search Books with Google Books API
Build a book search tool using the Google Books API. Find books by title, author, or subject with no API key required.
Translate Text with LibreTranslate
Build a simple text translator using the free and open-source LibreTranslate API. Supports dozens of languages.
Professional Comparisons
Can't decide? We've analyzed technical specs across popular API categories to help you choose.
Developer Guides
Master API integration from basics to advanced patterns.
Beginner's Corner
Never used an API before? Start here. These resources will take you from zero to making your first API call — no prior experience needed.
What is an API?
Learn the basics and make your first request in 5 minutes.
No-Auth APIs
Start with APIs that need zero setup — no keys, no sign-up.
API Keys & Auth
Understand API keys, headers, and how authentication works.
Beginner-Friendly APIs
Curated list of the easiest APIs for your first real project.