Every API, one clean contract.

One HS/HTS/commodity code + destination (US|UK) → the official tariff line: description, units, MFN duty rate (+ parsed % when ad-valorem), VAT/GST, special/preference programs, footnotes, schedule version. A 4/6-digit code resolves to its most specific rate-bearing line and lists context.

{
  "code": "8471.30.0100",
  "destination": "US"
}

Product description (+materials) + destination → ranked candidate HS codes with a confidence band, reason, and review_required. Candidates are SUGGESTIONS for a human/broker to confirm — low-confidence candidates are clearly marked, never shown as a settled code.

{
  "description": "leather shoes for men",
  "destination": "US"
}

HS code (or description → auto-classified) + destination + value (+origin, currency, shipping) → estimated duty + VAT/GST + total landed cost, with an explicit assumptions[] list and the disclaimer. A simple, honest estimate — NOT a customs quote.

{
  "code": "8471300000",
  "destination": "UK",
  "value": 1000,
  "currency": "GBP"
}

Freshness + coverage of the underlying official schedules (US HTS revision, UK tariff reachability) — so a caller knows how current the rates are and which markets are live.

Up to 25 products in one call (discounted). Each item is classified (or looked up if a code is given) independently; one bad item never fails the batch.

{
  "items": [
    {
      "description": "leather shoes"
    },
    {
      "description": "laptop"
    }
  ],
  "destination": "US"
}