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VS Code APIMatic Extension Overview

APIMatic offers a VS Code extension that enables you to easily validate and lint your API definition files in any of the supported formats. The API definition files are not only validated against standard checks but also linted for ensuring smoother SDK generation, Developer Experience Portal generation and API specification format transformation.

VS Code Extension APIMatic API Explorer

The extension provides a richer validation experience by offering dedicated views with messages organized for easy navigation, contextual data for each issues (e.g. line and path information, call tree to trace origin, etc.) as well as detailed descriptions, hints and reference documentation links for resolving issues quickly. It also supports auto-fixing commons issues found in OpenAPI v3 files (e.g. inline schemas) that hinders output quality or generation. You can also generate summary reports in multiple formats (PDF, HTML, JSON, Markdown) for sharing with any relevant stakeholders.

Once your API definition is ready, you can easily export them to your APIMatic Dashboard for SDK/DX portal generation without needing to leave the VS Code extension. Additionally, you can also perform transformation to a selected export format and obtain the output within your workspace.

Installation Guide

First, make sure that you have:

  1. Visual Studio Code version 1.75.0 or above installed. Use download link.

  2. A stable internet connection.

Next, to install the APIMatic for VS Code extension, simply head over to the Visual Studio Marketplace:

APIMatic for VS Code Extension Marketplace

On successful installation, the APIMatic API Explorer should be visible in the Activity Bar:

VS Code APIMatic Explorer View

For further information regarding installation of a VS Code extension, please visit the official documentation here.

Getting Started - VS Code Walkthrough

To help you quickly familiarize yourself with all the main features and capabilities, the extension includes a comprehensive getting started walkthrough as part of the VS Code welcome feature:


This step-by-step guide provides a hands-on experience, making it easier for you to get started.

If you're having trouble finding the walkthrough or need to revisit it later, you can also access it using the extension's Help view Start Walkthrough option:

Help view

Getting Started - How to Validate an API Definition

Step 1: Authorize Yourself With APIMatic

To start using the extension, you first need to authorize yourself with APIMatic. Click on the Authorize button visible in the welcome view:


This will open up the APIMatic login page in your default browser. If you are a new user, you will need to sign up first which should take a few quick steps (and its free):

Sign up

Once you have successfully logged in, you will be redirected back into your VS Code extension:

Successful Login Redirect

Your session details will be visible in the Manage Session view of the APIMatic API Explorer:

Manage Session

Step 2: Open an API Workspace Folder

To validate your API definition, you need to have a dedicated workspace folder open in your VS Code where you will work with one or more files associated with the API definition itself. If you already have a folder open that also contains an API definition (e.g. OpenAPI), you will receive a notification to open it as an API workspace in the extension. Click Yes to select it as your API workspace:


If you do not have an existing API workspace folder, you can still open it as your API workspace. For this guide, we use an empty workspace folder as shown below:

Empty Workspace

Navigate to the APIMatic API Explorer view in the Activity Bar and click on Use Current Workspace Folder to select current folder as your API workspace.

Use Current Folder Workspace

Step 3: Import an API Definition

If your workspace already contains an API definition, its main entry file will be auto-detected and the validation should start automatically. However, for our current example the workspace does not contain any API definition, therefore, a welcome view is shown with various options to create/import an API definition.

Workspace Welcome View

We will import a JSON sample file using the relevant options as shown below:

Workspace Welcome View

Step 4: Fix any issues in the API Definition

As soon as an API definition is added to the workspace, it will be auto-validated. You can also manually trigger validation by saving your API definition files.

When the validation completes, the APIMatic API Explorer views, Editor and Problems view will be populated with relevant data to help you tackle all issues.

API Definition Validation

Once you have resolved all blocker issues, you can export your API definition to your APIMatic Dashboard to start generating an SDK or a Developer Experience Portal.


The VS Code extension offers the following: