Setting up a local Mockoon server allows you to simulate REST APIs instantly without writing backend code or relying on live external services. It is an open-source, offline-first application that runs entirely on your local machine, making it perfect for frontend development and local testing.
This step-by-step tutorial walks you through installing Mockoon, building your first mock API endpoint, and running your local server. Step 1: Download and Install Mockoon
You need to install the desktop application to use the graphical interface. Head to the official website to download Mockoon.
Choose the installer matching your operating system (Windows, macOS, or Linux). Run the installer and open the application. Step 2: Create a New Environment
In Mockoon, an “Environment” represents your distinct mock server. It runs on its own dedicated port, allowing you to run multiple separate APIs side by side.
Click the New environment button (or the + icon in the left sidebar).
Choose a location on your hard drive to save the environment’s configurations as a .json file. Name your environment (e.g., My Local Test Server).
Note or modify the assigned port number (the default is usually 3000). Step 3: Configure Your First API Route
Every new environment starts with a default blank route. You can tailor it to mimic any API response. How to mock API using Mockoon
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