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.

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Trusted by awesome teams at

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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.

Highly customizable and powerful mock APIs

Mockoon offers a wide range of features to create the most realistic mock APIs: dynamic templating, rules matching, JSON databases, proxy mode, webhooks, TLS support, and more.

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Create realistic scenarios and test edge cases

Simulate real-life scenarios and improve integration testing with dynamic templating and rules-matching systems. Test your app resilience with chaos engineering features.

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Integrate with your existing APIs and workflows

Forward requests to your real APIs, record and replay them. Ensure your app performs flawlessly with real-world data and responses.

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Collaborate with your team in real-time

Supercharge your team productivity with Mockoon Cloud. Collaborate on your mock APIs in real-time, deploy them to the cloud, and share them with your team.

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Self-host your mock APIs

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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Deploy your mock APIs in cloud functions

Deploy your mock REST APIs in cloud functions, compatible with most providers: AWS Lambda, GCP Functions, Firebase Functions, etc.

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Privacy friendly and offline first

Our tools are offline first and require no account creation. They are privacy-friendly, making them the best choice for highly regulated or high-security environments.

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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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