The U.S. Postal Service provides a suite of USPS Web Tools that can be used to validate or find mailing addresses, track and confirm mail delivery, calculate shipping rates, and create domestic or international shipping labels.
With this Open/Distribute Priority API, senders can expedite batch shipping by enclosing individual pieces of mail in an approved USPS Priority shipping container to be opened and distributed at a mail processing facility or destination delivery unit.
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.