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

It combines a desktop application to design and run mock servers locally, and a CLI to self-host your fake APIs. A cloud is also available to collaborate with your team, keep your data in sync, and deploy your mock APIs.

API mocking helps you speed up development and third-party API integration by reducing dependency on external services and their limitations: rate limits, costs, availability, etc.
It also allows you to test your applications in a controlled environment with predictable responses, status codes, and latencies, and easily simulate edge cases and error scenarios.
Finally, you can onboard new team members faster by providing them with a consistent and reliable environment to test and develop their applications.

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Features

Mockoon offers many features:

• Unlimited number of mock local servers and routes
• CLI to run your mock in headless environments, CI, etc.
• Complete control on routes definition: HTTP methods and statuses, regex paths, file serving, custom headers, etc.
• OpenAPI compatibility
• Record/logs of all entering and forwarded requests
• JSON templating
• Proxy forwarding mode
• HTTPS support

You can check the complete list on the website.

Download the desktop application

You can get Mockoon desktop's latest release directly from this repository or on the official website. Mockoon desktop is also available through:

MacOS:

• Homebrew: brew install --cask mockoon.

Windows:

• winget: winget install mockoon.
• Chocolatey: choco install mockoon.
• Windows Store

Linux:

• Snap store: snap install mockoon.
• AUR: yay -S mockoon-bin.

Install the CLI

Mockoon CLI is available as an NPM package. Please check our dedicated documentation to learn how to install and use it.

Use in cloud functions and serverless environments

Mockoon's Serverless NPM package provides an easy way to run Mockoon's mock APIs in cloud functions and serverless environments: AWS Lambda, GCP Functions, Firebase Functions, etc.

Please check our dedicated documentation to learn how to use it.

Support us!

Mockoon is proudly independent and open-source, maintained without external funding. We rely on both sponsorships and Mockoon Cloud subscriptions to keep improving the project and building new features. A big thank you to the companies below for supporting our work and helping us grow (and all the sponsors who helped this project over time!):

Platinum

Gold

Silver

If you'd like to support Mockoon as well, you can become a sponsor or subscribe to Mockoon Cloud, every contribution helps keep the project alive and evolving. Thank you!

Subscribe to Mockoon Cloud

With advanced features for solo developers and teams, Mockoon Cloud supercharges your API development:

• ☁️ cloud deployments
• 🔄️ data synchronization and real-time collaboration
• 🤖 AI powered API mocking
• 📃 Access to dozens of ready-to-use JSON templates.
• 💬 Priority support and training.

Upgrade today and take your API development to the next level.

Mockoon's documentation

You will find Mockoon's documentation on the official website. It covers Mockoon's most complex features. Feel free to contribute or ask for new topics to be covered.

Changelogs

You will find Mockoon applications changelogs on the official website.

Support/feedback

You can discuss all things related to Mockoon and ask for help on the official community. It's also a good place to discuss bugs and feature requests before opening an issue on this repository.

Contributing

If you are interested in contributing to Mockoon, please take a look at the contributing guidelines.

Please also take a look at our Code of Conduct.

Roadmap

If you want to know what will be coming in the next release you can check the global Roadmap or subscribe to our newsletter.