Where MotorRank’s comp data comes from

MotorRank reads public listings from 11 sourcesto power its valuation engine. Every result in our deal feed is tagged with the source it came from so you can verify the price yourself on the marketplace it’s from. We don’t republish full listings — we use the data to compute comparables (year, make, model, trim, mileage, price, region) and link you back to the source.

Auto.devPartner data feed
Partner data feed of dealer inventory across the US. Reaches MotorRank as JSON via the Auto.dev API.
AutoTraderMarketplace
Public dealer and private-seller listings on autotrader.com.
CarGurusMarketplace
Public listings on cargurus.com — large coverage of US dealer inventory.
CarMaxFixed-price retailer
Fixed-price retailer. CarMax's public no-haggle prices are one of the cleanest comp baselines in the market.
Cars.comMarketplace
Public listings on cars.com. We read VIN-level price, mileage, and dealer location for comp baselines.
CarvanaFixed-price retailer
Fixed-price online retailer. Listed alongside CarMax for the no-haggle comp baseline.
CraigslistPrivate-party
Public RSS feeds from US metros. Primary source of private-party comp pricing, which dealer feeds underrepresent.
eBay MotorsAuction + buy-now
Official eBay Browse API. Auction + fixed-price vehicle listings, queried via OAuth token (no scraping).
Facebook MarketplacePrivate-party
Reached only via the optional MotorRank browser extension when a signed-in user views a listing they want a verdict on. We never crawl Facebook server-side.
MarketCheckPartner data feed
Partner data feed providing normalized dealer-listing coverage. Used alongside Auto.dev for breadth.
TrueCarMarketplace
Public listings on truecar.com, server-rendered HTML.

How we use these sources

Listings are stored in MotorRank’s comp cache (year, make, model, trim, mileage, price, region, VIN where available) and used to compute valuations. We do not republish raw listing photos or descriptions; the verdict page links back to the source URL for each comp. Partner feeds (Auto.dev, MarketCheck) arrive over licensed APIs; public marketplaces (Cars.com, Craigslist, …) are read politely with an identifiable bot UA, with robots.txt respected and per-origin rate limits. Facebook Marketplace is read onlythrough the optional MotorRank browser extension running in a user’s own session — never server-side.

Every result card surfaces its source as a small badge — via Cars.com, via Craigslist (private seller), shared by an extension user, etc. We’d rather you trust the data than guess where it came from.

Run a marketplace and want us to stop reading public listings, or want to talk about an official feed integration? hello@motorrank.us.