Pulling a live seller's Item Catalog from local development environment

Is there a way to connect to a live seller account while developing locally on my machine? I understand that the API calls to live accounts must be made via https, so perhaps this is not possible. Am I missing something in the work flow, moving from a sandbox account and fake products and now wanting to get access to the seller’s products to further build out my site?

This is definitely possible to do, and most of our APIs can be called from localhost without HTTPS, I believe, so that shouldn’t stop you. As long as you have the production access token, you’ll be able to interact with their account via the APIs. Let me know if you’re running into any issues with this though.