Integrating USPS's rate calculator involves sending a POST request to their API with essential parameters like origin, destination, and package details. Setting up the API requires user authentication and often necessitates creating an application within the USPS API Platform. The transition to new APIs by USPS, along with the retirement of older systems, complicates the process for developers. It is important to clarify terms such as 'APP,' which refers to a registered application needed to access USPS services instead of custom app development.
To integrate USPS's rate calculator effectively, a POST request needs to be sent to their API endpoint with specified parameters such as origin, destination, and package details.
While setting up the USPS API through CE Phoenix, ensure that proper authorizations are obtained, which often involve creating an app within the USPS API Platform.
Confusion arises from the transition of USPS APIs and their upcoming sunset of the current system, requiring users to adapt to new integration methods.
Understanding the concept of 'APP' in the USPS context boils down to recognizing it as a registered application that allows you access to their services, not a custom app development requirement.
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