Address Validation API Frequently Asked Questions

  • The Address Validation API has a rate limit of 6000 Queries Per Minute (QPM).

  • The Address Validation API is CASS Certified™, meaning it meets the USPS® standards for address validation.

  • More information regarding usage limits and address validation can be found in the provided documentation links.

Is there a rate limit on the API?

Address Validation API has a default rate limit of 6000 Queries Per Minute (QPM). See Usage limits and billing for more information.

Is the Address Validation API CASS Certified™?

The United States Postal Service® (USPS®)1 maintains the Coding Accuracy Support System (CASS™) to support and certify address validation providers. The Address Validation API is a CASS Certified™ service that you can optionally use as part of the address validation process.

For more information, see Validate an address.

  1. Google Maps Platform is a non-exclusive Licensee of the United States Postal Service®. The following trademark(s) are owned by the United States Postal Service® and used with permission: United States Postal Service®, CASS™, CASS Certified™. ↩