Comment by koen31

Grayjay dev here. What you suggest you can already do in the Grayjay Android app. Support has not been added in the desktop app yet. Harbor is the app you can use to claim that you own a specific account and then you can configure for example which Merch to show. It supports the largest storefronts if you input an URL it will automatically scrape that specific page and cache the results. You can however also input a JSON.