Messages publication
Publishing MongoDB messages use Producer operations and specific header files that you set by using the Publish action in IBM® DevOps Test Integrations and APIs (Test Integrations and APIs) tests.
Creating a publishing task
The first step in publishing MongoDB messages is to create a test in the Test Factory perspective of Test Integrations and APIs and add a Publish action to it.

Note:
A test can be created only within an existing operation. For information about
creating operations, folders and tests, and adding actions to tests, refer to API Tester Reference.