The U.S. Postal Service provides a suite of USPS Web Tools that customers may integrate into their own websites to validate or find mailing addresses, track and confirm mail delivery, calculate shipping rates, and create domestic or international shipping labels.
The Track & Confirm APIs provide estimated delivery information and the ability to track packages through the shipping process. It applies to packages shipped through the following services: Priority Mail, Express Mail, as well as Package Services (including Standard Post, Bound Printed Matter, Library Mail, Media Mail) that include Delivery Confirmation.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.