Best 2 Tools for API Endpoint Mocking in 2026
Last Updated: November 7, 2025
Testing against an API that is not fully built yet requires simulating what it would return. API Endpoint Mocking tools generate fake responses for endpoints during development.
Developers use endpoint mocking to keep building and testing without depending on a live backend.
Apidog
Apidog and 
Stoplight
StoplightVisual API Design and Documentation are the best for API Endpoint Mocking. So, let’s take a closer look at both tools.
Apidog is a platform that handles the complete process of creating and managing APIs. You can design your API structure, test how it works, create clear documentation, and share it with your team, all from one application.
The platform follows a design-first approach, which means you plan your API before writing code. This helps catch problems early and keeps everyone on the same page. It automatically creates mock servers so front-end developers can start working before the back-end is ready.
There is a free version that works great for small teams and individual developers. Paid plans add more features like unlimited projects, advanced testing tools, and priority support for growing businesses.
Stoplight is a web-based platform for API design and management that follows a design-first philosophy. This means you plan and design your API before writing any code, which saves time and reduces errors during development.
The platform includes Stoplight Studio, a visual editor that lets you create API designs using forms instead of code. It supports OpenAPI and JSON Schema standards, which are widely used in the industry. You can work directly with files in your Git repository, making it easy to fit into your existing workflow.
Stoplight automatically generates beautiful documentation from your API designs, creates mock servers for testing, and provides validation tools to catch errors early. It works as a cloud service but also offers desktop and web versions.