Vintage collector sports car photographed in dramatic black and white

“Finally, comps I can actually query.” — collector car dealer

The missing collector-car data layer for AI search.

Give bots, copilots, and pricing tools normalized auction history, active auction listings, and bid trails across seven sources - accessible through REST and MCP. Refreshed hourly.

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No credit card required · first useful query in 60 seconds · MCP tools included

Normalized daily from seven auction sources

Bring a TrailerCars & BidsHagertyPCAR MarketAll Collector CarsGooding & CoRM Sotheby's

The dataset

The market record that used to live across seven browser tabs.

Completed sales, live listings, and bid trails share one normalized structure — queryable by make, model, year, source, price, and status.

Completed sales: 275k+
Auction sources: 7
Data refresh: Daily
BaT listings + bids: Live
Bot-ready access: REST + MCP

Data normalization

One query surface for history and what is live now.

Seven platforms map into shared fields for make, model, year, price, status, and source metadata. Completed sales, active listings, and bid trails all come back as consistent JSON.

Auction results extract7 sources

Year	Make	Model	Source	Sold	Bids
1973	Porsche	911S Coupe	BaT	$189,000	42
1994	Toyota	Supra Turbo	Cars & Bids	$121,500	38
1967	Ford	Mustang GT	Hagerty	$86,240	31
1991	Acura	NSX	BaT	$101,000	35
1987	Ferrari	328 GTS	RM Sotheby's	$142,800	21
1970	Toyota	Land Cruiser FJ40	BaT	$45,000	23

GET /auctions/live?sort=ending200 OK

{
  "title": "1997 Porsche 911 Carrera",
  "auction_status": "active",
  "source": "bringatrailer",
  "year": 1997,
  "listing_make": "Porsche",
  "listing_model": "911 Carrera",
  "price": 74250,
  "current_bid": 71000,
  "bid_count": 18,
  "drivetrain": "RWD",
  "transmission": "Manual",
  "exterior_color": "Arctic Silver"
}

Use cases

Build, price, monitor, appraise.

One market data layer for teams turning collector-car auctions into products, pricing workflows, and alerts.

Build

Ship collector-car tools on normalized sales, live listings, and bid activity without building the ingestion layer.

Price

Price inventory against completed sales and current auction pressure from active listings.

Analyze

Track volume, sell-through, price percentiles, and appreciation trends across makes and models.

Appraise

Support insurance, lending, and appraisal work with defensible comparable auction evidence.

Monitor

Build ending-soon views, polling jobs, bid alerts, and market watchlists from the live feed.

Research

Give collectors and analysts a deeper archive for model research and purchase validation.

Access surface

The same market data, exposed for code and agents.

Search records, monitor live listings, calculate market context, or connect AI tools from one normalized auction data layer.

01REST

Auction History

Search completed sales by make, model, year, source, price range, and auction status.

/auctions

02REST

Live Auctions

List active BaT auctions with ending windows, current prices, bid counts, and polling filters.

/auctions/live

03REST

Market Statistics

Return price percentiles, volume, trends, and comparable-sales context for market intelligence.

/stats

04MCP

MCP Tools

Let ChatGPT, Claude, Cursor, and other clients query history, live listings, and bid trails.

api.oldcarsdata.com/mcp

05SPEC

OpenAPI Schema

Generate clients, validate responses, and wire collector-car data into production workflows.

/openapi.json

API access

Simple API pricing.

Start free, get a key immediately, and scale when the data is powering production work. Calls to makes and models are unmetered.

Starter

Free

10 metered requests every month

REST API key
MCP server access
Live BaT beta access

Get free key

1k

$49/mo

1,000 metered requests per month

Full history + live beta
All auction platforms
API + MCP commercial use

Start with 1k

10k

$199/mo

10,000 metered requests per month

Full history + live beta
All auction platforms
Higher-volume integrations

Start with 10k

All plans are month-to-month. No long-term contract.

Getting started

First useful query in 60 seconds.

01
Sign up & create a key
Create an account, pick a plan, and generate an API key in your profile. Pass it as a bearer token on every request.
02
Discover makes & models
Query the unmetered /makes and /models endpoints to get canonical, normalized values to filter on.
03
Query auctions or connect MCP
Hit /auctions for comps, /auctions/live for active sales, or point Claude, ChatGPT, or Cursor at the MCP server.

terminal

# 1. Find canonical makes (unmetered)
curl "https://api.oldcarsdata.com/makes"

# 2. Find models for a make
curl "https://api.oldcarsdata.com/models?make=Toyota"

# 3. Query auction data
curl "https://api.oldcarsdata.com/auctions?\
make=Toyota&model=Land+Cruiser&limit=10" \
  -H "Authorization: Bearer YOUR_API_KEY"

Reference notes

Frequently asked questions.

Those are consumer valuation guides for mainstream used cars. Old Cars Data is a developer-first API of actual collector-car auction outcomes — completed sales, live listings, and bid trails normalized across seven specialist sources.

Put live auction intelligence behind your product.

Get an API key and query completed comps, active listings, and bid history from the same data layer.