The usps address verification api example is an easy way to verify addresses against both the official USPS database and private databases for more accurate direct mail campaigns. It is a powerful tool for marketers and businesses who need to ensure that they are sending the right message to the right customers at the right time.
The USPS provides free access to their vast address data through the Web Tools program. They also update their address data weekly.
They also provide a free web interface that lets you enter addresses one-at-a-time and gives you quick thumbs up/thumbs down validation results.
However, the problem is that they are incredibly outdated and cannot keep up with today's technology. In addition, their documentation and support is weak and they don't offer any SDKs to make development easier.
Third-party service providers like PostGrid have to meet strict requirements in order to gain access to the USPS address database. These requirements include CASS certification, responsive support, and a dependable API that delivers reliable data.
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