## 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](https://developers.google.com/maps/faq.md.txt#usage-limits) for more information.

## Is the Address Validation API CASS Certified™?

The United States Postal Service® (USPS®)^[1](https://developers.google.com/maps/documentation/address-validation/faq.md.txt#fn1)^ maintains the
[Coding Accuracy Support System (CASS™)](https://postalpro.usps.com/certifications/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](https://developers.google.com/maps/documentation/address-validation/requests-validate-address.md.txt).

*** ** * ** ***

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™. [↩](https://developers.google.com/maps/documentation/address-validation/faq.md.txt#fnref1)