I am trying to use the API to pull items to search for items in one particular seller's store. The Finding API is giving me a CORS error and I cannot figure out how to limit results by seller in the shopping API. If anyone can point me in the right direction it would be greatly appreciated!
I think you'll want to use the Finding API, and troubleshoot that CORS error. The Shopping API (which call?) probably can't limit by seller, or if it can, is a pretty old API family, having been supplanted by the Finding API.