Every US duty rate and China tariff, one call

Who it's for

Anyone who needs a straight answer to "what duty do I pay on this, and does the China tariff hit it?" without digging through Chapter 99.

Try it

Type product words or an HTS code. Every row shows the US general duty rate and whether Section 301 China tariffs apply.

Real sample output

Captured from this API (GET /hts/8516.60.40, abridged).

{
  "code": "8516.60.40",
  "level": "tariff line (8-digit)",
  "description": "Cooking stoves, ranges and ovens",
  "fullDescription": "Electric instantaneous or storage water heaters and immersion heaters; electric space heating apparatus and soil heating apparatus; electrothermic hairdressing apparatus (for example, hair dryers, hair curlers, curling tong heaters) and hand dryers; electric flatirons; other electrothermic appliances of a kind used for domestic purposes; electric heating resistors, other than those of heading 8545; parts thereof: › Other ovens; cooking stoves, ranges, cooking plates, boiling rings, grillers and roasters: › Cooking stoves, ranges and ovens",
  "rates": {
    "general": "Free",
    "special": null,
    "column2": "35%"
  },
  "units": [],
  "footnotes": [],
  "section301": {
    "appliesTo": "products of China",
    "onList": true,
    "summary": "List 3 +25%",
    "actions": [
      {
        "heading": "9903.88.03",
        "list": "List 3",
        "additionalRate": "The duty provided in the applicable subheading + 25%",
        "additionalPercent": 25,
        "status": "in_effect",
        "effectiveFrom": null,
        "effectiveUntil": null,
        "matchedOn": "8516.60.40"
      }
    ],
    "exclusions": [],
    "describedProducts": []
  },
  "chinaDeal2026": {
    "status": "pending",
    "announced": "2026-09-26",
    "source": {
      "name": "Federal Register: USTR documents mentioning China (checked daily)",
      "url": "https://www.federalregister.gov/documents/search?conditions%5Bagencies%5D%5B%5D=trade-representative-office-of-united-states&conditions%5Bterm%5D=China"
    },
    "lastChecked": null,
    "onReductionList": null,
    "message": "The US–China reduction lists are not published yet. Dutyfinch checks the Federal Register every day and flags each code as soon as the list appears."
  },
  "children": [
    {
      "code": "8516.60.40.60",
      "description": "Microwave oven combinations"
    },
    {
      "code": "8516.60.40.70",
      "description": "Portable"
    },
    {
      "code": "8516.60.40.74",
      "description": "Of a maximum width not exceeding 70 centimeters"
    }
  ],
  "release": "2026HTSRev19",
  "dataBuilt": "2026-09-27T15:05:29Z",
  "source": "https://hts.usitc.gov/search?query=85166040"
}

Limits, plainly

Free and rate limited so it stays fast for everyone. Loop over your product list one code per call; an Importer key covers 2,500 calls a month, Broker 7,500 plus watch alerts on up to 100 codes, Team 40,000.

• Free tier: 50 calls a day per IP, 20 a minute, no key. Paid keys from $19/month (see Get an API key).
• Rates and Section 301 lists come from the current USITC HTS revision (shown as release in every answer) and are refreshed when USITC publishes a new revision.
• Section 301 lists are set at 8 digits; send an 8- or 10-digit code for an exact answer. Product exclusions are matched to the 10-digit lines they name; read the product text to see if yours qualifies.
• General information, not legal or customs advice. Section 232, IEEPA, antidumping/countervailing duties and fees are not included; confirm with CBP or a licensed customs broker.
• Watch alerts (Pro): up to 100 codes per key, one https webhook, checked daily and on every new HTS revision.

Get an API key

US tariff lookup API and MCP server: HTS code lookup and keyword search with official duty rates, Section 301 China list status (lists 1-4, 2024 increases, exclusions with end dates) and the 2026 US-China reduction flag; Pro adds webhook alerts when a watched code changes. Keys work on the REST API and the MCP server.

Pay with card, Apple Pay, Google Pay or Link through Stripe Checkout (sales tax/VAT handled by Stripe). Your key appears on the page you return to right after checkout: save it. Manage or cancel any time at dutyfinch.cybermax-tools.workers.dev/manage. Send it as x-api-key: YOUR_KEY (or Authorization: Bearer YOUR_KEY, which MCP clients support). Check usage at /key. Failed calls are not counted. Tariff APIs: US Tariff Rates Pro $49/month for 5,000 credits and Team $199 for 50,000; Tariffs API $199 for 10,000 calls; Global Tariff Rates $4.99 for 1,000; Dutify Plus $75 for 500 tariff lookups (median about $14.85 per 1,000, checked 27 Sep 2026). Dutyfinch Broker is $49/month for 7,500 calls plus webhook watch alerts on 100 HTS codes, Importer $19 for 2,500, and $5 pay-as-you-go for 500 calls.

Using several CyberMax APIs? CyberMax API All-Access: one key for all 9 APIs (this one included, 2,500 calls a month here) for $119/month. See All-Access

curl -s "https://dutyfinch.cybermax-tools.workers.dev/api/hts?..." -H "x-api-key: YOUR_KEY"

# MCP (Claude Desktop, Cursor, VS Code)
{ "mcpServers": { "dutyfinch": { "type": "http", "url": "https://dutyfinch.cybermax-tools.workers.dev/mcp",
  "headers": { "Authorization": "Bearer YOUR_KEY" } } } }

# Usage so far
curl -s https://dutyfinch.cybermax-tools.workers.dev/key -H "x-api-key: YOUR_KEY"

Use the API

JSON over HTTPS, CORS enabled, no key. GET for quick calls, POST a JSON body for lists. Spec: openapi.json · llms.txt

curl -s "https://dutyfinch.cybermax-tools.workers.dev/api/search?q=coffee+maker"

# lists: POST a JSON body
curl -s -X POST https://dutyfinch.cybermax-tools.workers.dev/api/search \
  -H "content-type: application/json" \
  -d '{"q":"wooden furniture","limit":5}'

import requests

r = requests.post("https://dutyfinch.cybermax-tools.workers.dev/api/search",
                  json={"q":"wooden furniture","limit":5}, timeout=30)
r.raise_for_status()
for row in r.json()["results"]:
    print(row)

Endpoints: /api/hts look up one hts code (also get /hts/{code}) · /api/search search the hts by product words or a code prefix · /api/section301 section 301 china lists: headings, rates, dates, counts · /api/china-deal 2026 us–china tariff reduction list: status and per-code flag · /api/watch pro: watch codes and get a webhook when a rate or china status changes

Add it to your AI agent (MCP)

A remote MCP server at https://dutyfinch.cybermax-tools.workers.dev/mcp (streamable HTTP, no auth). Read-only tools with JSON schemas, so agents know exactly what to send.

// Claude Desktop, Cursor, VS Code, any MCP client (remote, no key)
{
  "mcpServers": {
    "dutyfinch": { "type": "http", "url": "https://dutyfinch.cybermax-tools.workers.dev/mcp" }
  }
}

# Claude Code
claude mcp add --transport http dutyfinch https://dutyfinch.cybermax-tools.workers.dev/mcp

# Tools: lookup_hts_code, search_hts, section301_lists, china_deal_status
# e.g. lookup_hts_code({"code":"8516.60.40"})

• lookup_hts_code
  US tariff lookup for one HTS code (4, 6, 8 or 10 digits): description, general/special/column 2 duty rates, Section 301 China list status with the additional rate, exclusions, and the 2026 US–China reduction flag.
• search_hts
  Find US HTS codes from product words (e.g. "air fryer", "wooden toys") or a code prefix. Returns codes with description, general rate and Section 301 China summary.
• section301_lists
  All Section 301 China tariff headings (lists 1, 2, 3, 4A, 4B, 2024 increases, exclusions) with rates, dates and code counts.
• china_deal_status
  Status of the 2026 US–China tariff reduction list (pending / notice_published / published) and, with code, whether that HTS code is on it.

FAQ