SiteCheck US Tariff Lookup

x402

SiteCheck US Tariff Lookup is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-16).

Looks up US Harmonized Tariff Schedule (HTS) entries by HTS number or description keyword, returning duty rates and Chapter 99 additional duties from USITC.

Price / call$0.003

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StatusUnknown

How this service works

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Output

Returns a JSON object with matching HTS entries (HTS number, description, general rate, Column 2 rate, special rate, units, footnotes) plus any applicable Chapter 99 additional duty lines, a source attribution, timestamp, and a disclaimer that the data is informational only.

Example use cases

Import duty check for electronics

“I'm importing laptops from China — can you look up the current US tariff rate for HTS code 8471.30 and tell me if there are any additional Chapter 99 duties I need to worry about?”

Tariff research by product description

“Search the US Harmonized Tariff Schedule for entries related to 'portable data processing' and return up to 10 results with their duty rates.”

Customs compliance cost estimate

“What are the general and Column 2 tariff rates for HTS number 8471300100? I need to know the full duty picture including any special or additional duties before I finalize my import order.”

Technical details

Endpoint

GEThttps://api.sitecheck-api.workers.dev/api/tariff/us?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to look up current US import duty rates from the official USITC Harmonized Tariff Schedule, especially when you have an HTS number or prefix to query, or when you need to search by product description keywords. Prefer this over manual lookups when an agent needs structured tariff data including Chapter 99 additional duties programmatically.

Side effects

No results found for the given HTS prefix or keyword query
Query returns truncated results if limit is exceeded
HTS number not recognized or malformed returns empty results
USITC upstream API unavailability causes failure
Payment required (402) if x402 micropayment header is missing

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "note": "additionalDuties are Chapter 99 lines that USITC returns with the search; check whether each applies to the goods and origin.",
    "count": 1,
    "query": {
      "hts": "8471.30"
    },
    "source": "USITC Harmonized Tariff Schedule REST API (hts.usitc.gov, public domain)",
    "results": [
      {
        "units": [
          "No."
        ],
        "indent": 1,
        "footnotes": [],
        "htsNumber": "8471.30.01.00",
        "column2Rate": "35%",
        "description": "Portable automatic data processing machines, weighing not more than 10 kg, consisting of at least a central processing unit, a keyboard and a display",
        "generalRate": "Free",
        "specialRate": null
      }
    ],
    "checkedAt": "2026-10-15T18:21:06.382Z",
    "disclaimer": "Information only, not legal advice. Verify with official sources.",
    "additionalDuties": [
      {
        "units": [],
        "indent": 1,
        "footnotes": [
          "See chapter 99 statistical note 1."
        ],
        "htsNumber": "9903.41.15",
        "column2Rate": null,
        "description": "Automatic data processing machines, of the type of which the constituent units are integrated in the same housing, whether finished or unfinished, which incorporate a microprocessor-based calculating mechanism, are capable of handling data words of at least 16-bits off the microprocessor, and are designed for use with a non-cathode-ray tube (non-CRT) display unit, whether or not capable of use without an external power source (provided for in subheading 8471.30 or 8471.41)",
        "generalRate": "100%",
        "specialRate": null
      }
    ]
  }
}

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