How to Run WireMock as a Standalone Server: A Step-by-Step Guide



WireMock is a powerful tool for mocking APIs during development and testing. This guide will walk you through how to download and run WireMock as a standalone server, giving you more control over your testing environment.

Downloading the WireMock JAR File

  1. Visit the WireMock documentation: WireMock standalone: https://wiremock.org/docs/download-and-installation/
  2. Navigate to the "Standalone" section.
  3. Download the standalone JAR file. This file will allow you to run WireMock without any additional dependencies.

Starting the WireMock Server

  1. Open a command prompt or terminal window.
  2. Navigate to the directory where you downloaded the WireMock JAR file. You can use the cd command to change directories.
  3. Run the following command to start the WireMock server:
        java -jar wiremock-standalone-VERSION.jar
  • Replace VERSION.jar with the actual filename of the JAR file you downloaded (e.g., wiremock-standalone-3.5.4.jar).
  1. By default, WireMock will start on port 8080. You can access the WireMock web interface at http://localhost:8080/.

Using Different Options

WireMock offers various command-line options to customize its behavior:

  • Specifying a different port:
        java -jar wiremock-standalone-VERSION.jar --port 9090

  • This command starts WireMock on port 9090 instead of the default 8080.

  • Enabling HTTPS:

        java -jar wiremock-standalone-VERSION.jar --https-port 6217

  • This command enables HTTPS on port 6217. Note that by default, WireMock will also bind to port 8080 (HTTP) unless you use the --disable-http option.

  • Disabling HTTP:

        java -jar wiremock-standalone-VERSION.jar --https-port 6217 --disable-http
  • This command disables HTTP and only allows connections over HTTPS on port 6217. You'll need to have a valid SSL certificate configured for this to work.

Understanding Mappings and Files

When you start WireMock, it creates two directories in the current directory: mappings and files.

  • Mappings: These are JSON files that define how WireMock should respond to specific incoming requests.
  • Files: These are external files containing response data that can be referenced in mappings.

We'll explore configuring mappings and files in more detail in future posts.

This guide provides a basic understanding of running WireMock as a standalone server. By following these steps and exploring the available options, you can leverage WireMock's capabilities to effectively manage your API testing workflow.

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