Shippo

Shippo sends a webhook on a created transaction. Give it an incoming address from the dashboard and say once which of its fields go where on the shipping label. Nothing to build on their side.

How to set it up

1. 01Dashboard → Notifications → incoming: create a hook and copy its address.
2. 02In Shippo, add a webhook for a created transaction that posts to that address.
3. 03Map their JSON onto the template for the shipping label; the dashboard shows the last payload so you can see the field names.