The Printful PHP SDK by Printful allows API communication to implement personalized printing features into applications. The SDK documentation is in sync with the API, aiming to facilitate interaction with product catalog, orders, file library, shipping rate, and eCommerce platform interfaces.
Postmaster, a cloud-based, small package shipping platform for SMBs and eCommerce companies, has announced the launch of the public beta version of the Postmaster API. The Postmaster API was designed to allow easy integration of multiple shipping carriers into e-commerce systems as well as to help companies save time and money throughout the entire shipping process.
Adding shipping and posting functionalities to your applications may be necessary for your what you're trying to achieve, but it may not always be a quick and easy process. EasyPost is a posting and shipping service specifically designed for applications, saving developers some very valuable development time. The EasyPost API makes it possible for developers to access this functionality and easily integrate it with other applications.