I have an API call where I am getting a list of customers from a site and a transformer that is filtering to only include relevant data for each customer:
Select sqlCustomers.customer_name, apiCustomers .DisplayName from {{qryCustomers.data}} as sqlCustomers
join {{restCustomers.data}} as apiCustomers on sqlCustomers.id=apiCustomers.Id
One prereq is to transform your query into an array (return formatDataAsArray(data)). It looks like your API results are in the right format already.
In that case just use a Bulk Insert query. You will need to create a transformer that will create an array of objects with properties that have the same names as your table. Pass that array into the Array of records to insert setting.