USPS Address Verification API Example
- Joeyoj Holmsdhh
- Feb 16, 2023
- 1 min read
Address verification is a critical step in building a reliable mailing or shipping application. It ensures that addresses are correct, formatted to USPS standards, and have the proper postal service codes. It also helps minimize delivery delays and service fees.
The United States Postal Service (USPS) has an extensive address database that covers the entire country. It contains detailed details that private address databases cannot match.
However, the USPS does not share this data with just anyone. It requires third-party service providers like PostGrid to obtain a CASS certification. This certification allows them to access the USPS address database and validate addresses.
There are a number of different address validation APIs available in the market that can help you validate addresses. Some of these address verification APIs are free, while others cost a small fee.
Some of the APIs that you can use include:
GetCityStateProvince – returns the city and state/province to which an input postal code belongs in USA.
You can also use this API to determine whether an address is business or residential. This can help increase the accuracy of courtesy rate quotes.
ValidateMailingAddressUSCAN – checks addresses against the known address databases for US and Canada.
It also provides parsed address fields and field validation codes.
This API is useful for checking the correctness of addresses before sending a mail. It also adds missing postal information and formats it to meet the rules of the applicable postal authorities.
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