Create a list item in a different site collection

I have a List called ‘Customers’ in a site collection named ‘A’. This Customers list is associated with a workflow. Also I have a another site collection called ‘B’. It has a list called ‘Products’. I need to add a item to the ‘Products’ list using the workflow associated with Customers list.

I just searched about the possibility about this on internet and found that the only way to achieve this functionality is to create a custom workflow action with Visual Studio using lists web service. Also some people have suggested to use CSOM with ECMAScript instead of using the workflow. I have a SharePoint On-Premises version and would like to know whether I can achieve this functionality.

If I can achieve this with a custom workflow action I would like to know the basics for doing this. Any references or tips will be greatly appreciated.

I also referenced the following questions regarding this issue.

Question 01

Question 02

I’m also trying to achieve this functionality with ‘Call HTTP Web Service’ workflow action available with SharePoint 2013 workflows as explained in this MSDN article.

MSDN Article on How to use ‘Call HTTP Web Service’ with SharePoint 2013 workflows