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Create mock APIs in seconds

Mockoon is the easiest and quickest way to design and run mock REST APIs.
No remote deployment, no account required, free and open-source.

Trusted by awesome teams

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"Mockoon is the answer to just about every mocking need you might have."
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Yasmin Desai

Senior Product Manager @ Impala

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"Mockoon was easy to start with, was fast and lightweight. One clear purpose tool which immediately solved our problem."
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Jan Bílek

Product Manager @ Localazy

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API mocking that saves you time

Get working mock REST APIs in seconds with an intuitive and easy-to-use interface.
Run them everywhere with the CLI.

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Integrates with your workflow

Compatible with the OpenAPI specification, Mockoon integrates perfectly with your existing applications and API design workflow.

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Complete tooling

Go beyond mocking with advanced features and tackle the most complex situation with HTTP requests recording, proxying, integration testing, etc.

Customizable

Complete control

Mockoon offers you complete flexibility when creating your mocks: custom statuses, route and global headers, file serving or body editor, HTTPS, etc.

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Powerful

Create realistic scenarios

Simulate real-life scenarios with dynamic templating and the response rules system. Test your app resilience with sequential and random responses.

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Integrable

Powerful forwarding and debugging

Easily integrate Mockoon with existing backends and APIs by intercepting selected endpoints and forwarding the rest. Debug intricated situation with the built-in session recording.

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Ubiquitous

Run your mock servers anywhere

Use the CLI and the Docker image to run your mock REST APIs on servers and headless environments: GitHub Actions, CircleCI, TravisCI, etc.

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Case studies

Discover how Mockoon's users improve their API design and development workflows with our fast and easy to use API tooling.

Uses Mockoon to conduct API UX research

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Uses API mocking to speed up application development and testing

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