USPS Address Validation API Documentation

If you're trying to get a list of addresses for a particular item, you may be wondering how you can use USPS address validation API. The USPS Web Interface is free to use, but you'll want to consider using other services. While some service providers offer limited free address lookups, none are completely free. Nonetheless, the USPS interface is easy to use, allowing you to input valid addresses and receive an error message if they are not. The downside to this interface is that you can't get a list of addressed for a particular item, and you can't perform bulk address verification.

Fortunately, there are plenty of other methods of address validation available. USPS provides a Web Interface for submitting addresses, and this API allows you to validate each address one at a time. The API also offers a method to validate addresses with a thumbs-up or thumbs-down icon. Whether you need to verify a delivery line or get an address's ZIP+4 or 2-digit delivery point is entirely up to you.

While USPS' Address Validation API documentation makes it difficult to understand, it is an important tool for obtaining accurate information about a particular address. It is best to stick with the documentation that comes with it. While USPS's API is great, it's not the only one available. If you're using the API for commercial purposes, make sure you understand what the end result is and how it works.