CBSV Web Service

If you anticipate a large volume of verifications, web services may be your best choice.

The CBSV web service allows a business application to talk to and receive a response from our SSN verification service.

Although SSA cannot provide development support, we do provide a developer guide, a testing environment, and troubleshooting support. Review the CBSV Client Development Guide to determine what you will need to create a web service client.

CBSV Web Service Support

CBSV Interface Specification

CBSV Client Development Reference Guide

Email your technical questions to

Email your CBSV program-related questions to

View Service Outage messages at the Business Services Online page.