Mockoon

Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open-source. It has been built with Electron and can be used on Windows (exe), Linux (deb, rpm, Appimage, and Snap), and MacOS (dmg or brew). Get working mock REST APIs in seconds with an intuitive and easy-to-use interface. Run them everywhere with the CLI. Compatible with the OpenAPI specification, Mockoon integrates perfectly with your existing applications and API design workflow. Go beyond mocking with advanced features and tackle the most complex situation with HTTP requests recording, proxying, integration testing, etc. Mockoon offers you complete flexibility when creating your mocks: custom statuses, route and global headers, file serving or body editor, HTTPS, etc. Simulate real-life scenarios with dynamic templating and the response rules system. Test your app resilience with sequential and random responses.