Sold prices, live auctions, and bid trails from 19 auction houses in one schema. Query it over REST, or hand it to your agent over MCP.
Free plan, no card required
REST
MCP tools
Webhooks
/auctions?status=sold&sort=date&limit=7200 OKWhy it exists
Every house writes its own titles, files models under its own names, and changes its pages without warning. The scraper that worked last month quietly returns nothing today.
Old Cars Data reads every listing and maps it to a canonical year, make, model, price, and status, so a car is the same record wherever it sold. You maintain one integration instead of 19.
As published on Sotheby's Motorsport
1967 Pontiac Bonneville Convertible 428 HO
Sold for USD $35,000 on 10/28/26
{ "source": "sothebysmotorsport", "year": 1967, "ocd_make_name": "Pontiac", "ocd_model_name": "Bonneville", "listing_model": "Bonneville Convertible 428 HO", "price": 35000, "auction_status": "sold", "auction_end_at": "2026-10-28 21:00:00"}What you get
Every plan includes REST and MCP. Start with sold results, then add live auctions, bid trails, market stats, and webhooks as you build.
GET /auctions?status=soldEvery 15 minutes400,000+ completed results, each with the final price, the house, and when it ended. Never asking prices or estimates.
2007 Ferrari 430
Current bid, bid count, and time left from 14 houses, plus the full bid ladder from the 7 that publish one.
What have Porsche 911s sold for lately?
1,262 Porsche 911s sold at auction in the last 12 months. The median was $91,000, and the middle half sold between $62,250 and $172,000.
Connect Claude, ChatGPT, or Cursor over MCP once, then ask what a car is worth. Every answer is built on real comps.
POST your-app.com/hooksSigned with your secretauction.ended1970 Porsche 914 · sold $37,000200bid.created1955 Ford Thunderbird · bid $16,100200auction.created2008 Porsche Cayman · listed200Webhooks push auction.ended, auction.created, and bid.created to your endpoint, signed so you can verify every delivery, with a log you can retry from.
The market already set the price.
Now your code can read it.
How it works
Sign up with email or Google and your key is ready right away. The free plan needs no card.
Query sold results over REST, or add the MCP server to Claude and ask in plain English.
curl -G \
https://api.oldcarsdata.com/auctions \
-d make=Porsche -d model=911 \
-d status=sold -d limit=10 \
-H "Authorization: Bearer $OCD_API_KEY"Or connect Claude Code
Price inventory, back up an appraisal, or let an agent answer what a car is worth. Move to a paid plan when you need volume, from $49 a month.
Coverage
Sold results come from all 19 houses. Live auctions come from 14, and bid trails from the 7 that publish them.
| House | Sold | Live | Bids |
|---|---|---|---|
| Bring a Trailer | |||
| Cars & Bids | |||
| Hemmings | |||
| AutoHunter | |||
| Hagerty | |||
| PCAR Market | |||
| All Collector Cars | |||
| Gooding & Co | |||
| RM Sotheby's | |||
| Barrett-Jackson | |||
| Sotheby's Motorsport | |||
| Car & Classic | |||
| The Market | |||
| Broad Arrow | |||
| MB Market | |||
| Mecum Auctions | |||
| PistonHeads | |||
| Collecting Cars | |||
| Bonhams |
Pricing
Requests and webhook deliveries share one monthly allowance. Failed attempts, webhook tests, and lookups against makes and models never count.
$0
10 requests a month
$49/month
1,000 requests and deliveries a month
$199/month
10,000 requests and deliveries a month
$699/month
100,000 requests and deliveries a month
The free plan needs no card. Paid plans are month to month, and you can cancel anytime from your billing portal.
Questions
Anything else, write to support@oldcarsdata.com and a person will answer.
Those are valuation guides for mainstream used cars. Old Cars Data is an API of actual collector car auction outcomes: completed sales, live listings, and bid trails, normalized across 19 specialist houses.
Bring a Trailer, Cars & Bids, Hemmings, AutoHunter, Hagerty, PCAR Market, All Collector Cars, Gooding & Co, RM Sotheby's, Barrett-Jackson, Sotheby's Motorsport, Car & Classic, The Market, Broad Arrow, MB Market, Mecum Auctions, PistonHeads, Collecting Cars, Bonhams. Sold results come from all of them, live auctions from 14, and bid trails from the 7 that publish them.
Completed sales are refreshed every 15 minutes, and live auctions update while bidding is open.
Completed results run from 2018 to today, 400,000+ sales in all.
Ten metered requests a month over REST or MCP, with no card. Lookups against makes and models are free. Price stats, commercial use, and webhooks start on the 1K plan.
Each REST call, MCP tool call, and successful webhook delivery counts as one. Failed attempts, webhook tests, and management calls are free, and so are lookups against makes and models.
Yes. The 1K, 10K, and 100K plans include commercial use of the REST API and the MCP server, so you can power production pricing tools, dashboards, and agents.
MCP is the open protocol AI clients use to call tools. Our MCP server lets Claude, ChatGPT, Cursor, and your own agents search sold results, live auctions, bid trails, and price stats in plain English, with no glue code.
Yes. Connect Claude or ChatGPT to the MCP server once, then ask about any car in plain English. Answers come from real auction results, with a link to each listing.
Prices are the results each house reports, mapped to canonical make, model, year, price, and status fields. Buyer's premium treatment varies by house, so check the source link when that matters. Treat statistics as market context, not a final appraisal.
Yes. Paid plans are month to month with no contract, and you can cancel from the billing portal in your account whenever you like.
Sold results, live auctions, and bid trails over REST or MCP, from one free key.
Free plan, no card required