How can I get latest SKU of a product through API?

We are a 3PL that allows clients to manage their inventory on a customized dashboard with data pulled from ShipHero. How can we use the API to pull the latest SKU of a product from ShipHero so that the correct one is always displayed, given that customers may change their SKU of a product on Shopify and that would update the SKU in ShipHero, and we would need to show the latest SLU on our dashboard so that all 3 platforms show the same SKU?