Free Working API Endpoints for Developers
Live REST API endpoints returning real JSON data. Free, no authentication, CORS enabled. Perfect for frontend testing, learning API integration, building demos, and portfolio projects. Access users, products, orders, and analytics endpoints instantly.
User management endpoints with profile data, statistics, and user information
Returns detailed user profile information
Product catalog endpoints with inventory, categories, and pricing data
Returns product catalog with prices and details
Returns available product categories
✨ Create Your Own Custom API Endpoint
Need specific data structure? Use our AI JSON Generator to create custom JSON and publish it as a live API endpoint in seconds! Describe your data in plain English, let AI generate it, then get a permanent URL. Perfect for custom mock data, specific test scenarios, and unique prototyping needs.
Order management endpoints with transaction history and order analytics
Returns sales analytics and metrics
System monitoring endpoints for health checks, configuration, and status
JavaScript Fetch
fetch('https://formatjsononline.com/api/users')
.then(response => response.json())
.then(data => console.log(data));cURL Command
curl -X GET "https://formatjsononline.com/api/users" \ -H "Accept: application/json"
Why Developers Choose Our Free API Endpoints
Trusted by thousands of developers, students, and teams worldwide for reliable API testing
Start testing instantly - no registration, no API keys, no authentication complexity. Copy the URL and make your first API call in seconds.
Realistic, well-structured data following REST API best practices. Proper status codes, headers, and consistent data types mirror real-world APIs.
Test directly from your browser or web applications without CORS restrictions, proxy servers, or configuration headaches. Perfect for frontend frameworks.
Perfect for Every Development Scenario
From learning to production prototypes - versatile endpoints for all your needs
Build React, Vue, Angular, or Svelte apps with real API data. Test state management, loading states, and error handling.
Perfect for students learning API integration, async/await, and data fetching without backend setup complexity.
Showcase your skills with real API integration. Build impressive demos that work without managing backend infrastructure.
Test API clients, validate response handling, and ensure error scenarios work correctly before production deployment.
Frequently Asked Questions
Are these real working API endpoints?
Yes! These are fully functional REST API endpoints hosted 24/7 on reliable infrastructure. You can make GET requests to any URL and receive real, properly formatted JSON data immediately. No setup required - perfect for testing applications, learning API integration, building prototypes, and creating portfolio projects without backend complexity.
How do I test these API endpoints?
Testing is simple! You can: (1) Click any endpoint URL to view JSON directly in your browser, (2) Use API testing tools like Postman, Insomnia, or Thunder Client, (3) Run curl commands in your terminal (e.g., curl https://formatjsononline.com/api/users), (4) Make fetch() or axios requests in your JavaScript/React/Vue applications, or (5) Test from mobile apps using URLSession or Retrofit. All endpoints support CORS for seamless browser-based testing.
What data do these APIs return?
Our APIs return realistic, production-quality JSON data including: user profiles with names, emails, avatars, and roles; product catalogs with SKUs, prices, categories, and inventory; order histories with transaction details, statuses, and timestamps; analytics data with metrics, charts, and KPIs; system health checks with uptime and configuration. All responses follow RESTful best practices with proper status codes (200 OK), headers (Content-Type: application/json), and consistent data structures.
Can I use these APIs in production?
These APIs are designed for development, testing, learning, and prototyping purposes. They're ideal for: building portfolio projects, creating product demos, teaching API concepts in courses, testing frontend applications during development, and rapid MVP creation. For production applications serving real users, you should implement your own backend APIs with authentication, rate limiting, data validation, business logic, database persistence, and compliance with data regulations (GDPR, CCPA).
Do these APIs require authentication?
No authentication whatsoever! These test endpoints are completely open and free - no API keys, OAuth tokens, JWT authentication, or user registration required. This zero-friction design makes them perfect for: beginners learning API concepts, quick prototypes without auth complexity, frontend developers testing UI without backend dependencies, teaching environments where simplicity matters, and public demos or portfolio projects. Focus purely on API integration and response handling.
What HTTP methods are supported?
Currently, all endpoints support GET requests for retrieving data - the most common and essential operation for API testing and frontend development. Every response includes proper HTTP 200 OK status, Content-Type: application/json header, CORS headers (Access-Control-Allow-Origin: *) for browser compatibility, Cache-Control headers for performance, and UTF-8 charset encoding. While POST/PUT/DELETE aren't available (to maintain consistent data for all users), GET requests cover 90% of learning and testing scenarios.
Are there any rate limits or usage restrictions?
We maintain fair usage limits to ensure these free endpoints remain fast and available for everyone. For typical development use (hundreds of requests per day for testing, learning, or prototyping), you'll never encounter limits. The infrastructure handles reasonable traffic spikes during development. For high-volume testing or automated test suites, consider: implementing client-side caching, using our AI JSON Generator to create dedicated custom endpoints, or throttling requests to 1-2 per second. Production workloads requiring thousands of requests per minute need dedicated API infrastructure.
How can I create custom API endpoints with my own data?
Use our AI JSON Generator to create custom endpoints in minutes! The workflow: (1) Describe your data structure in plain English (e.g., '50 employee records with names, departments, salaries'), (2) AI generates perfectly structured JSON matching your requirements, (3) Review and customize the data - edit values, add fields, adjust structure, (4) Click 'Publish as API' to get a permanent, public URL, (5) Use your custom endpoint immediately in applications. Perfect for specific data schemas, testing edge cases, client demos, teaching with domain examples, and portfolio projects with unique datasets.
Can I use these APIs in coding tutorials, courses, or educational content?
Absolutely! These APIs are perfect for educational content. Instructors and creators use them because: (1) Zero setup for students - no backend installation or deployment, (2) Consistent data - tutorials won't break from API changes, (3) CORS enabled - students can build browser projects without proxies, (4) Realistic responses - data quality matches real-world APIs, (5) Multiple domains - cover e-commerce, user management, analytics in one place. Use freely in YouTube tutorials, online courses, coding bootcamps, blog posts, or documentation. Attribution appreciated but not required!
What's the difference between these endpoints and other mock API services?
Our endpoints offer unique advantages: (1) No registration or API keys - start immediately, (2) Truly free with no hidden paywalls or feature limits, (3) Permanently available - won't disappear or require subscription renewal, (4) Multiple realistic data types in one place (users, products, orders, analytics), (5) Integration with AI JSON Generator for custom endpoints, (6) CORS enabled by default without configuration, (7) Used and trusted by thousands of developers worldwide. While services like JSONPlaceholder offer similar functionality, we provide more diverse data types and seamless custom endpoint creation.
Ready to Get Started?
Choose from our suite of JSON tools to start processing your data right away.
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