In an increasingly digital world, direct mail remains a powerful tool for businesses seeking to engage with their audience in a tangible and personal way. One of the most innovative advancements in this space is the use of postcard APIs, which streamline the process of creating and sending postcards through automated systems. If you’re new to this concept, this guide will walk you through the essentials of using postcard APIs and how they can elevate your direct mail campaigns. What is a Postcard API? A Postcard API is an application programming interface that allows developers to integrate postcard creation and…