MCP server · Claude / Cursor / any MCP client

US import duties, resolved inside your AI workflow.

Name: tariff-resolver
Author: Opsloft

Since the de minimis exemption ended, every US-bound shipment needs an HTS code and a duty calculation — and the rates keep moving by executive order. tariff-resolver gives your AI assistant the actual tariff schedule: 35,000+ HTS lines, Chapter 99 additional-duty rules, MPF/HMF fees. No scraping. No stale training data.

$claude mcp add tariff-resolver -- npx -y tariff-resolver

View on GitHub

Free & open source, MITWorks offlineNo API key

tariff-resolver — live demo· runs in your browser

Tools

What your assistant can do with it

Plain description → HTS candidates

Top matching tariff lines with MFN/FTA rates and links to CBP CROSS classification rulings. Screen a catalog before your broker sees it.

search_hs_candidates

Code + origin + value → the full duty stack

Base rate, active Chapter 99 additional duties — terminated provisions filtered — plus MPF/HMF. Structured JSON, ready to reason over.

calculate_tariff_scenario

{ "hts": "9617.00.10.00", "origin": "CN",
  "customs_value": 10000, "mode": "ocean",
  "total_rate": "42.7%", "total": "$4,267.14" }

Your codes, tracked across revisions

Watchlist your catalog's HTS codes and diff rates between schedule revisions — know when an executive order moves your margins.

watch_tariff_changes

Install

Free and open source (MIT).

Ships with a full HTS snapshot — works offline, no API key needed.

MIT licenseFull HTS snapshot includedNode.js ≥ 18

Copy the command
$claude mcp add tariff-resolver -- npx -y tariff-resolver
Paste it in your terminal
Paste into the terminal where you use Claude and press Enter — it sets itself up.
Ask your first question
Your assistant now has the tariff schedule.
Try the example prompts ↓

Other MCP clients

{"command":"npx","args":["-y","tariff-resolver"]}npm GitHub

Prompts

Try these first

"Find the HTS code for a men's 100% cotton t-shirt."

SCENARIO

"Calculate the tariff scenario for HTS 6109.10.00, origin China, customs value $5,000, ocean freight."

SOURCING

"Compare landed cost for $10k of vacuum flasks sourced from China vs Vietnam."

MONITOR

"Watch tariff changes for my catalog: 6109.10.00, 8507.60.00, 9617.00.10."

Early access

Hosted version

A remote MCP endpoint with an always-current schedule, tariff-change alerts to your inbox, and bulk catalog runs — no local setup. Free while in beta: email us one line about how many SKUs you import and from where.

contact@opsloft.dev

Or open in your mail app.

Install