Find free public APIs for testing, prototyping, and learning. Browse hundreds of endpoints across 40+ categories — from animals and weather to finance and AI. Most require no API key.
We curate only the best free public APIs so you can focus on building, learning, and prototyping — not hunting for working endpoints.
Our free online HTTP request tester lets you send GET, POST, PUT, DELETE requests directly in your browser. Like an online curl or fetch tool — no install, no signup. Try the tool →
Hundreds of free API endpoints are available immediately with no registration, no credit card, and no waiting. Perfect for rapid prototyping and learning REST APIs.
From Animals and Weather to Blockchain and Machine Learning, every category is hand-curated and verified. Find the right free test API in seconds.
Filter by authentication type, HTTPS support, CORS headers, and more. Find the exact free REST API for testing that fits your project's requirements.
Our blog covers tutorials on how to use free public APIs for testing — with code examples in JavaScript, Python, and curl for every skill level.
Our directory pulls from the community-maintained public-apis repository, ensuring links stay fresh and descriptions remain accurate for developers worldwide.
Backed by a community of 300,000+ developers on GitHub. Every API listing is reviewed for quality, security, and reliability before being included.
These free public APIs are the most commonly used for learning, prototyping, and testing. No API key required.
Get random dog images grouped by breed. One of the most beginner-friendly free APIs with no authentication required and full CORS support.
All the Star Wars data you've ever wanted — people, films, starships, vehicles, species, and planets. Completely free, no key needed.
Access astronomy picture of the day, Mars rover photos, near Earth objects, and more from NASA. Free API key available with generous rate limits.
A free fake REST API for testing and prototyping. Serves posts, comments, albums, photos, todos and users. The go-to mock API for frontend developers.
Free global weather forecast API for non-commercial use. No API key required, HTTPS and CORS supported. Real hourly forecasts worldwide.
Real-time crypto prices, market data, and coin details. The public tier is free with no API key required — ideal for crypto portfolio projects.
New to APIs? Follow these steps to make your first API call in under 5 minutes using only a browser or terminal.
Browse our directory and pick an API that matches what you want to build. Filter by "No Key Required" to find free REST APIs for testing you can call immediately without signing up anywhere. Good starting points: Dog API, JSONPlaceholder, Open-Meteo, or SWAPI.
Click the "View Docs" link on any API card to go to the official documentation. Good documentation will show you the base URL, available endpoints, query parameters, and example responses in JSON format.
Paste the endpoint URL directly in your browser, use curl in your terminal, or write a fetch() call in JavaScript. For free APIs with no key, you'll get a JSON response instantly with no setup required at all.
Every modern free public API returns data in JSON format. Use JavaScript's response.json(), Python's requests library, or any HTTP client to parse and work with the data. Build your app, test your frontend, or practice data handling.
Chain multiple free APIs together to create a real project — a weather dashboard, a crypto tracker, a fun facts generator. Our blog has step-by-step tutorials for building full projects using only free public APIs for testing and learning.
Copy any of these examples to make real API calls right now using free public APIs that require no authentication.
// Free API for Testing — No API Key Required // Example: Fetch a random dog image using the Dog CEO free API const fetchFreeAPI = async () => { // This free endpoint requires no authentication at all const url = 'https://dog.ceo/api/breeds/image/random'; try { const response = await fetch(url); const data = await response.json(); // Response: { status: "success", message: "https://..." } console.log('Dog image URL:', data.message); return data; } catch (error) { console.error('API call failed:', error); } }; fetchFreeAPI(); // ──────────────────────────────────────────── // More free test APIs to try: // JSONPlaceholder: https://jsonplaceholder.typicode.com/posts // Open-Meteo: https://api.open-meteo.com/v1/forecast?latitude=40.71&longitude=-74.01¤t_weather=true // Cat Facts: https://catfact.ninja/fact // Bored API: https://www.boredapi.com/api/activity
In-depth guides on how to use free public APIs for testing, building projects, and practicing your development skills.
A hand-picked list of free public APIs you can call right now in your browser — no registration, no credit card, no waiting. Perfect for testing and learning.
Learn what REST APIs are, how HTTP methods work, and how to make your first API call using free tools like Postman, curl, and plain JavaScript fetch.
Understand when to use a free fake API for testing and prototyping versus a real production API. Includes free mock API tools and best practices for frontend developers.
Step-by-step tutorial to build a real weather dashboard using Open-Meteo (free, no key) and a geolocation API. Complete JavaScript source code included.
Everything you need to know about using free APIs for testing and learning.
Send GET, POST, PUT, DELETE requests right in your browser — no Postman, no curl installation needed. The free online HTTP request tool for developers: test any REST API instantly with headers, auth, JSON body, and curl export.