When we have a project containing the test case, we can add a data source.
The test case contains one REST Request test step, which will use the data source.
First, we add the data source:
Since data sources are mostly useful together with a loop (otherwise you'll only get one data item), Ready! API will suggest that you also add a Data Source Loop to your test case.
Note: Normally, we would do this right away, but for the purposes of this tutorial, we will add the loop later to keep things a bit separate.
The Data Source test step is created:
Double click the data source to open it. Then, specify the data source type: