Correct and enhance US mailing addresses in real-time
Test drive our USPS CASS-Certified Address Validation API.
Instantly verify, correct and standardize US addresses with near-perfect match accuracy with USPS. Sign up for a free API key.
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Fast. Accurate. Secure.
Our full-featured, US Address Validation API is built for today’s applications. With sub-second response times, you can instantly correct and append addresses to meet USPS standards.
How it Works.
Integrate our simple API and submit your addresses for validation. Our CASS-certified service will verify, correct and append your addresses, returning results formatted to meet USPS standards.
Input Provided
Address1
27 E Cota Ave
Address2
City
Santa Barb
State
Calufurnia
ZIP
93100
The Result
corrected
appended
Address1
27 E Cota Street
Address2
Service Objects
City
Santa Barbara
State
California
ZIP
93101-7603
Simple API
Supported with comprehensive documentation and support for most major programming languages.
USPS CASS-Certified
Over 10 years of near-perfect match
and correction accuracy that exceeds USPS standards.
Full Featured
Validates and corrects difficult addresses and appends: ZIP+4, DPV, RDI, SuiteLink, barcode and more.
Developer Support
Developer guides, sample code, sample data, and support directly from the developers that built the API.
Integrations
Easily integrated with major CRMs, sales and marketing platforms, like Salesforce, Marketo and Hubspot.
Our APIs are built by developers, for developers, with comprehensive documentation, developer guides, sample code, sample data and everything you need to get up and running as fast as possible
Watch a short video (1:03) on how easy it is to integrate our API.
We offer sample code for most major programming languages.
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