BREAKING: USPS slashes address verification to 60 addresses/hour. What now?

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SECURITY ANNOUNCEMENT: Removing old TLS versions

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Jonathan Oliver

Jonathan Oliver

Updated October 29, 2025

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Technical support

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TLS (and its predecessor SSL) are cryptographic protocols that provide authentication and data encryption for clients connecting with web servers. As new vulnerabilities are discovered, older cryptographic protocol versions are deprecated to maintain secure environments.

On Tuesday, January 21, 2020, Smarty will require clients to use TLSv1.2 or greater to connect with Smarty APIs without interruption. Clients using TLSv1.0 or TLSv1.1 will no longer be able to connect. Please refer to our documentation for more information: https://www.smarty.com/docs/cloud/requirements#ciphers

To see if your client software is able to properly connect, please use our test page: https://test-tls.api.smarty.com/

The industry, in general, is removing support for older TLS versions. Please refer to the following announcements from major browser vendors for more information:

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USPS API rate limit capped at 60 requests per hour: How to prepare and why many are choosing Smarty

Because who doesn’t love juggling one more thing during the holiday season…? A major shift in the address-verification landscape is approaching at the beginning of the new year. On January 25, 2026, the United States Postal Service (USPS) will officially retire its long-standing Web Tools APIs, a free API that previously allowed for approximately 5 address lookups per transaction. This includes the legacy USPS Address Information APIs that many organizations have depended on for years. Under USPS’s new API structure, the default quota for many services, including the Addresses API, is 60 requests per hour.

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