Know which tariff change hits which product—and what your entry data shows.
Upload a broker, ACE or product CSV. TariffOS maps official U.S. tariff changes to your HTS codes and origins, reports entered value or duties only when your file supplies them, and creates a broker-ready action brief.
Parsed in your browser. Nothing is uploaded, no signup, no card.
Want the workflow first? Read the step-by-step guide
Section 232 pharmaceutical tariffs (phased in from July 31, 2026)
All origins · HTS 30 · 2026-07-31 · 91 FR 18183
Section 301 tariffs on China (Lists 1–4A and 2024 strategic increases)
CN · HTS 84 85 8703 8507 · 2018-07-06 · 91 FR 24636
Section 232 semiconductor tariffs (25%, advanced AI chips)
All origins · HTS 8541 8542 8473 · 2026-01-15 · 91 FR 2443
Section 232 medium- and heavy-duty vehicle tariffs
All origins · HTS 8701 8702 8704 8706 · 2025-11-01 · 90 FR 48451
See TariffOS with a business like yours
Three quick questions. No email required. We’ll load a clearly labelled fictional catalog so you can see a realistic dashboard before sharing any data.
See how the real-file workflow worksTariff Volatility Is the New Normal
Section 301 and Section 232 measures can overlap; exclusions, effective dates, and origin rules can change how a product is treated. Reviewing multiple agency publications takes time. TariffOS summarizes selected measures, links their official publications, and labels data scope and availability.
How it works
From your file to your broker
Three steps. Nothing is uploaded and no account is created along the way.
- 1Your file
Drop in a CSV
A broker invoice, an ACE extract or a product export. It is parsed in your browser, so the file never leaves your machine.
- 2The join
Lines match to measures
Each line's HTS prefix and country of origin are checked against every tracked measure, with the governing source shown for each match.
- 3The output
Take the brief to your broker
A source-linked action list: what is collecting now, what changes next, and which lines are worth asking about.
Latest tariff changes
Linked to a Federal Register notice, CBP guidance, or court ruling. Verify product-level applicability before acting.
Tariff deadlines & expiring pauses
Review the upcoming pause expirations, truce deadlines, scheduled escalations, and review dates recorded in the curated dataset.
Built for Your Role
Different roles need different intelligence. See exactly how TariffOS works for yours.
Supply Chain Leaders
Source-linked tariff research for portfolio decisions
Customs Brokers
A faster starting point for measure and deadline research
Trade Compliance
A source-linked index for selected measures and deadlines
Importers
Test landed-cost assumptions before a purchase order
Policy Analysts
A structured index into selected primary-source measures
Your Tariff Command Center
Each public tool addresses a specific research or calculation task.
Free Tariff Tools
Try a tool right now. No account, no credit card. Bookmark whichever helps your workflow.
One engine, three ways in
The same verified resolution engine, coverage disclosure, and change feed — from your code, your AI assistant, or your Shopify admin.
Audit-grade duty resolution over REST
Batch resolution with input hashing and source-pinned results, plus a verified measure-change feed your software can poll. Free tier: 500 calls/month.
Read the API docsConnect Claude, Cursor, or any MCP client
The resolution engine, coverage matrix, and change feed as native AI-assistant tools — one config block, same API key, every plan.
Set up MCPRun the catalog workflow inside Shopify
Read-only access to products and inventory. TariffOS does not change products, orders, or checkout.
View the Shopify appFrequently Asked Questions
Everything you need to know about TariffOS
Next step
Start with the file you already have.
Run a broker, ACE or product CSV through the same source-linked workflow shown in the example.
Parsed in your browser. Nothing is uploaded, no signup, no card.