Tariff Monster (tariff.monster) is a tariff calculation and simulation platform used by United States customs brokers, freight forwarders and importers of record. It is owned and operated by Bridgemaster Holdings LLC of Hapeville, Georgia.
The domain was registered in August 2026. A few security products, Datto AV among them, have misclassified it as new, suspicious or phishing. If your users see a block page when they open Tariff Monster, add the domains below to your allow list. We are working with the rating vendors to correct their records.
1. Domains to allow
tariff.monster www.tariff.monster freetariffcalculator.com
tariff.monster | The application, and every link in our email. Required. |
|---|---|
freetariffcalculator.com | Short links in our text messages. They forward to tariff.monster. |
Inside the application, a few steps load well-known services that are normally allowed already: Stripe (stripe.com, js.stripe.com) for billing and identity checks, Persona (withpersona.com) for identity verification, and Google Maps (maps.googleapis.com, maps.gstatic.com) for address lookup.
2. Where to add them
| Datto AV | In the Datto AV policy, open DNS Secure and add each domain to the Trusted Domain List. Enter the domain only, without https://. |
|---|---|
| Microsoft Defender for Endpoint | Add an Allow indicator for each domain under Settings › Endpoints › Indicators › URLs/Domains. |
| Other products | Look for an allow list, trusted sites, exceptions or a category override in your web filter, DNS filter, firewall or endpoint web-protection policy. |
3. Email from Tariff Monster
- Messages come from an
@tariff.monsteraddress (usuallyrawr@tariff.monster), sent through Amazon SES and signed with DKIM fortariff.monster. They pass SPF, DKIM and DMARC. - Sign-in links look like
https://tariff.monster/login.php?t=…. Each one works once and expires after 30 minutes. - Link scanning such as Microsoft Defender Safe Links is fine. Opening a link only shows a Sign In button; nothing happens until a person presses it.
4. How to check it is really us
- Tariff Monster has no passwords. People sign in with a one-time link we email to the address on their account.
- Our sign-in pages ask only for an email address.
- Company: Bridgemaster Holdings LLC, Hapeville, Georgia, USA (bridgemaster.us).
- Contact: rawr@tariff.monster · +1 (212) 316-5800.