Where did you get a yaml file from? We don’t integrate to NetSuite’s public apis, we’ve built out RESTlets all within NetSuite that we interact with and that’s why we require installation of our SuiteApp in NetSuite. We then make a nice UI over these to interact with where you just need to choose the record type you want to create and then map to the fields. Mapper will even fetch the fields from your environment.
There are many thread about making item fulfillments and there are some templates in the marketplace:
- Understanding When to Use itemkey, itemname, and sitemname Fields in NetSuite Item Fulfillment Records - #3 by tylerlamparter
- Choose any marketplace bubble and see a sample config
