USS Auction Data Parser & API

USS is Japan’s largest physical and online car-auction house — the original source of the famous Japanese auction sheets, with a standardized overall grade (S/6/5/…/1), interior grade and a panel-by-panel condition map — and Carapis can extract that auction data through one REST API. Tens of thousands of cars run weekly, members-only and with no public website, and Carapis can serve the structured sheet data without you holding an auction membership.

What is USS Auction?

USS (USS Co., Ltd.) is Japan’s largest used-vehicle auction operator, running both physical auction sites and an online bidding network. It is a members-only B2B system with no public website — access is normally through auction-membership or proxy/export agents (e.g. via ASNET). USS is the origin of the Japanese auction sheet: a standardized inspection report giving each car an overall grade, interior grade and a diagrammed panel condition map. Tens of thousands of vehicles are graded and sold every week.

Market Position

USS is the dominant force in Japanese car auctions, and its auction sheets set the de-facto standard for the entire Japanese-used-car export industry. Because it is members-only with no public site, its data is reachable mainly through proxy and export services — which is exactly why an API matters: it is the richest structured condition data in the world but the hardest to reach. The grading scale (overall S/6/5/4.5/4/3.5/3/2/1, plus R/RA accident marks; interior A–D) is normalizable across millions of cars (SBT Japan; Provide Cars).

What the API returns

{
  "id": "0193f2c1-...",
  "source_code": "encar",
  "brand_name": "BMW",
  "model_name": "320i",
  "trim": "M Sport",
  "year": 2021,
  "price_usd": 28400,
  "price_original": "38900000",
  "price_original_currency": "KRW",
  "mileage": 45000,
  "fuel_type": "gasoline",
  "transmission": "automatic",
  "has_accident": false,
  "listing_url": "https://...",
  "photos": [{ "url": "https://cdn.carapis.com/..." }],
  "first_seen_at": "2026-09-28T11:04:22Z",
  "is_available": true
}

This is the marquee dataset of the region: a standardized, machine-normalizable condition grade plus a panel-level damage map — unmatched anywhere else in the world for vetting used-car condition remotely.

API Quick Start

import requests
 
resp = requests.get(
    "https://api.carapis.com/v2/listings",
    params={"source": "uss-auction", "limit": 20},
    headers={"Authorization": f"Bearer {API_KEY}"},
)
for car in resp.json()["results"]:
    print(car["make"], car["model"], car["year"], car["auctionGrade"])

const res = await fetch(
  "https://api.carapis.com/v2/listings?source=uss-auction&limit=20",
  { headers: { Authorization: `Bearer ${process.env.CARAPIS_API_KEY}` } },
);
const { results } = await res.json();

curl "https://api.carapis.com/v2/listings?source=uss-auction&limit=20" \
  -H "Authorization: Bearer $CARAPIS_API_KEY"

Get an API key at my.carapis.com  and see the full API reference. Pricing is on the pricing page .

Use Cases

• Import / export — auction-sheet grades let exporters and importers vet and price Japanese cars remotely with confidence. See import & export.
• Pricing intelligence — hammer prices are true wholesale benchmarks for Japanese used cars. See dealership tooling.
• Market research — track auction volumes, grade distributions and wholesale price trends. See market research.

Frequently asked questions

Related platforms