A Metapack shipper account (see Creating an Account)
A Delivery Options API key
If you are a new Metapack shipping customer, both of these prerequisites will be provided by your Metapack Professional Services implementation consultant.
If you are an existing Metapack customer but not currently using the Delivery Options API, you must request an API key from your Metapack account manager.
Sign into your Shopify.com account and download the Metapack Shopify app to your account.
After the integration has been installed, it must be configured before you can start using it.
Metapack supports the installation and configuration of the Metapack Shopify app.