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Getting started

There are many ways to run Imposter. There are two categories: run a standalone server, or embed it within unit/integration tests.

Standalone mock server

Embed in unit/integration tests

Choosing an approach

If you are looking for a quick local development solution, use the CLI.

If you want to run Imposter as a standalone mock server, you can run it as a Docker container. If Docker isn't your thing, or you want to build Imposter yourself, you can use it as a standalone JAR file. Standalone servers are often useful when you require long-lived mock instances.

You can also use it as a mock server for your unit tests on the JVM or Node.js, starting it before your tests, providing synthetic responses to your unit under test. Embedded instances tend to be short-lived and exist only for the duration of your test execution.


Let's assume your configuration is in a folder named config.

CLI example:

imposter up ./config -p 8080

Docker example:

docker run -ti -p 8080:8080 -v $PWD/config:/opt/imposter/config outofcoffee/imposter

Standalone Java example:

java -jar ./imposter.jar --configDir ./config

Your mock server is now running!

These examples start a mock server using the simple REST plugin, serving responses based on the configuration files inside the config folder. You can hit the URL http://localhost:8080/example to see the mock response.

What's next

Learn how to use Imposter with the Configuration guide.