Mockoon

Overview of Mockoon

Mockoon is the fastest and most straightforward way to create mock REST APIs for development and testing purposes. This free, open-source desktop application enables developers to design and run mock servers locally without requiring remote deployment, account creation, or internet connectivity. Trusted by development teams worldwide, Mockoon accelerates API development workflows by providing realistic simulation environments that integrate seamlessly with existing tools and processes. Perfect for API Client and Local Web Server testing scenarios.

The tool supports comprehensive API mocking with unlimited routes, parallel environment execution, and advanced features like dynamic templating, rules-based response matching, and proxy mode for redirecting undefined routes. With compatibility for OpenAPI specifications and extensive deployment options including CLI, Docker, and cloud functions, Mockoon serves as an essential development tool for frontend, backend, and full-stack engineers working on API-driven applications.

How to Use Mockoon

Getting started with Mockoon involves downloading the desktop application, creating mock API environments with defined routes and responses, and running them locally or deploying through various methods. Developers can import existing API specifications via OpenAPI format, configure response rules and templates, then execute mock servers either through the graphical interface or command-line tools. The workflow supports real-time collaboration through Mockoon Cloud while maintaining offline functionality for privacy-conscious development environments.

Core Features of Mockoon

1. Unlimited API Mocking – Create unlimited mock APIs with parallel execution and unlimited routes
2. OpenAPI Integration – Import and export API specifications with full Swagger/OpenAPI format support
3. Dynamic Templating – Implement realistic responses with URL parameters, query strings, and JSON body lookups
4. Advanced Routing – Support for route regex patterns based on ExpressJS syntax with multiple responses per route
5. Proxy Mode & Recording – Redirect undefined routes to real APIs and record HTTP requests for replay

Use Cases for Mockoon

• Frontend development without backend dependencies
• API integration testing and validation
• Chaos engineering and resilience testing
• CI/CD pipeline testing with Docker and CLI
• Team collaboration on API design and specifications
• Educational purposes for API development learning
• Privacy-focused development in regulated environments

Support and Contact

For support and inquiries, contact contact@mockoon.com or visit the official Mockoon website for documentation and community channels.

Company Info

Mockoon is developed by 255kb and operates as an open-source project focused on providing accessible API mocking solutions. The tool maintains privacy-friendly principles with offline-first functionality and no account requirements, making it suitable for various development environments including highly regulated industries.

Login and Signup

Mockoon requires no account creation or login for local usage. For cloud features and team collaboration, visit Mockoon Cloud to access additional functionality including real-time collaboration and cloud deployments.