When you enable ShipperHQ on a store, additional fields become available on the product level:
These field values can be set in the control panel by the merchant as well as using one of the following:
If you duplicate a product in the control panel and have ShipperHQ installed, metafields for ShipperHQ will be duplicated along with the product or variant.
You must enter the metafields exactly, otherwise, they will not work. Since metafields can store information against a product, if the namespace for example is set to shipping and not shipping.shipperhq, it will not update the shipping information.
When you set Shipping Origins using the API, you cannot delete the fields using the control panel. You must send a DELETE request to the metafields resource.
To add a ShipperHQ metafield, set the namespace field to shipping.shipperhq: