Structured webhook events with before/after state, Federal Register citations, and dollar-impact estimates. Built on authoritative USITC data.
Your compliance team finds out about duty changes weeks late — from a customs broker, a trade publication, or worse, a penalty notice. By then you've already overpaid on dozens of shipments, mispriced inventory, and locked in contracts at the wrong landed cost.
A single missed Section 301 increase on a high-volume HTS code costs more per year than your entire compliance team's salary.
Fast alerting with authoritative confirmation. Never miss a change, never act on noise.
NLP pipeline ingests new Federal Register documents within minutes of publication. Extracts tariff-relevant actions, flags affected HTS codes, and delivers preliminary alerts before official confirmation.
Authoritative comparison against the official USITC Harmonized Tariff Schedule. Byte-level diff produces exact rate changes with legal citations and deterministic event keys.
Structured events with audit proof. Integrate in an afternoon, not a quarter.
{ "alert_type": "hts_rate_change", "status": "confirmed", "hts_code_display": "8471.30.01.00", "change_type": "rate_increase", "old_rate_bps": 0, "new_rate_bps": 2500, "delta_bps": 2500, "effective_at": "2026-09-27T00:00:00Z", "citation_url": "https://federalregister.gov/d/2026-02044", "estimated_annual_impact_usd": 125000 }
GET /api/v1/hts/8471300100/state { "hts_code": "8471300100", "formatted": "8471.30.01.00", "description": "Portable automatic data processing machines...", "general_rate_bps": 0, "section_301_bps": 0, "total_applicable_bps": 0, "authoritative_as_of": "2026-02-08" }
The people who live and die by the Harmonized Tariff Schedule.
Recalculate landed costs instantly. Renegotiate supplier contracts before the effective date. Stop overpaying duties on shipments already in transit.
Alert your entire client base within minutes, not days. One integration replaces manual monitoring for your entire book of business.
Audit-ready documentation of every rate change. Demonstrate proactive compliance to CBP auditors with timestamped provenance.
Historical state queries for litigation. Point-in-time tariff snapshots with SHA-256 hashes and source citations for customs disputes.
Pipe webhook events into your ERP to auto-update landed cost calculations. No manual lookups, no stale spreadsheets, no human in the loop.
Automatically flag purchase orders that become unprofitable at the new duty rate. The payload includes dollar impact based on declared annual trade value.
Preliminary FR alerts give you days or weeks of lead time before a change takes effect. Enough time to shift orders to alternative origin countries.
Every diff is hash-addressed and source-cited. When CBP questions a classification or rate, you have timestamped proof of the published rate on the date of entry.
Focused Assessment and C-TPAT audits require demonstrable duty monitoring. TariffDiff's notification ledger and historical state endpoint are purpose-built for this.
Pay for the HTS codes you track. No platform fees, no per-seat licensing.
For importers tracking a focused product line.
For brokers and mid-market import operations.
For compliance teams and large-scale operations.
For law firms, brokerages, and platform integrators.