I did a search before posting and I did not find what I was looking for in this subject.
What I would like to do is be able to look up an item/product by it's SKU where I can then get the item ID for doing things like change available QTY or pricing. At the moment we are not planning or able to store off an item id/sku cross reference table.
I've look at the the Product API options and while there was a product ID get, no SKU. Short of pulling down a list every time I run the program getting specific fields I was hoping there was a better way to lookup by SKU.
Edit: I should add that this is for a back end ERP system and maintaining a cross reference table adds complexity and we really cannot change Item Master tables in the system.
Alas I am building a process in c#. GraphQL looks interesting, but not in my wheel house at the moment. It seems the Shopify only cares about internal id's with their REST API which is a bother since it requires a customer to keep an index of not just product/items, but orders as well since there is no look up by external order number, just the internal id.
Thank you for the reply.