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Best vehicle market-data APIs (2026)

Last updated: October 2026

Seven vehicle market-data APIs compared on Canadian coverage, listings, price data, published pricing, free tiers and access, with every vendor claim linked.

Cardog is first on this list. It serves Canadian listings in CAD and kilometres, with search, counts and facets filtered on exact refs and specs, plus market quotes that give the median, quartiles, best price and days on market for a model year or build configuration, with the sample size behind every number and daily price history. All of it is keyed to the same refs as Cardog's VIN decode, recalls and spec sheets. The other APIs on the list are MarketCheck, Canadian Black Book, VinAudit, CarsXE, Auto.dev and Vehicle Databases; each is summarized below from its own public pages.

This page is written by Cardog, and Cardog is on the list, so read it with that in mind. Every claim about another company links to that company's own public page, and we checked those pages on 2026-10-26. Every Cardog claim is something our API serves today.

How we evaluated

"Market data" covers three different things, and each vendor serves its own mix:

Listings. Live vehicles for sale, searchable and countable.
Market statistics. Asking-price spreads and days on market for a slice of the market.
Valuation. A price estimate for one vehicle from its details.

For each vendor we asked:

Canadian coverage. Does the vendor's own page say it covers Canada, and in which currency?
Data depth. Listings, statistics, valuation, or a mix?
Pricing transparency. A published price with a currency, or quote only?
Free tier. Can you test without talking to sales?
Access. Self-serve key, or sales-led?
Docs, SDKs and MCP. Public docs, client libraries, and an agent server.

We only used each vendor's own public pages. We did not sign up for paid accounts or compare numbers for the same vehicle across vendors.

Comparison table

Vendor	Coverage as stated	Key data	Pricing as published	Free tier	Status
Cardog	Canadian listings; prices default to CAD, radius in km	Listing search, counts, facets; quotes with median, P25, P75, best price, days on market; daily price history	Credits; 1 per listings request, 5 per quote request; plans from US$30 a month	50 credits a month, no card	Public docs, self-serve
MarketCheck	Active dealer listings "across the US and Canada" (Inventory Search)	Dealer, private party and auction listings; price prediction; days supply; sales stats (Cars API)	Basic $299, Standard $749 a month plus data fees; Enterprise on inquiry (pricing)	500 calls a month (pricing)	Public docs, self-serve
Canadian Black Book	Not stated on the API page (API)	Wholesale, trade-in, retail, private party and residual values; retail listing insights (API)	Not published (API)	Not published	Sales-led
VinAudit	`country` of `usa` or `canada` (Market Values)	Mean, standard deviation and count by VIN (Market Values)	Not stated on the Market Values page	Not stated on the Market Values page	Public docs
CarsXE	Mileage in "kilometers in Canada" (Market Value)	Wholesale, retail, trade-in and auction values by VIN (Market Value)	Plan quota plus overage; Starter from US$40.83 a month billed annually (pricing)	Sandbox, 5 market value calls lifetime (pricing)	Public docs, self-serve
Auto.dev	"U.S. physical & online dealers" (Vehicle Listings)	Listing search with filters on make, model, year, price and mileage (Vehicle Listings)	Growth US$299 plus US$0.0015 a listings call; Scale US$599 plus US$0.001 (pricing)	1,000 calls a month across three APIs (pricing)	Public docs, self-serve
Vehicle Databases	"US vehicles, 1981 to present" (Market Value)	Trade-in, private party and dealer retail values (Market Value)	Pay as you go, monthly or yearly plans (home)	15 free credits (home)	Self-serve sign-up

Where a vendor's page shows "$" without naming a currency, we show "$" as published.

1. Cardog

Canadian listings and market statistics behind one API key. Listings: GET /v2/listings/search, /count and /facets, and GET /v2/listings/vin/{vin}, which returns a listing with its variant and full canonical spec in one call. Market: GET /v2/quotes and GET /v2/tape/history/{ref}.

Canadian by default. Prices default to CAD, the search radius is in kilometres, and a page holds up to 250 rows.
Filters that never silently miss. Make, model, body style and fuel are refs; an unknown ref returns a 400 that names it, never a fuzzy match or an empty page.
Spec filters and facets. Filter listings on canonical specs, and get counts and facets over the same set.
Quotes with a sample size. Each quote gives liveCount, bestPrice, priceP25, priceMedian, priceP75, avgDomDays, price cuts over the last 30 days and asOf, for a model year or a build configuration, with up to 20 refs per call. See Market data.
Price history. The tape returns daily bars for an instrument over a window.
One set of keys. The same refs join quotes and listings to the VIN decode, Transport Canada and NHTSA recalls, and spec sheets.
Built for developers and agents. TypeScript and Python SDKs, a remote MCP server at mcp.cardog.io with market quote and inventory search tools, and a dated Cardog-Version header.

Pricing. 1 credit per listings request and 5 credits per quote request (a multi-quote of up to 20 refs is one request). The Free plan is 50 credits a month, no card, hard stop; paid plans from US$30 a month. See Pricing.

2. MarketCheck

A listings and market analytics API. Active dealer inventory "across the US and Canada, refreshed daily," with facets, stats and per-listing days on market (dom) (Inventory Search). Private party and auction search, market days supply, sales stats, sold vehicle summaries and OEM incentives (Cars API). MarketCheck Price estimates a value from a VIN, mileage and location, with US endpoints in USD and Canadian endpoints in CAD (MarketCheck Price).

Pricing and status. Free: 500 calls a month at 5 a second with a 100-mile radius. Basic: $299 a month plus data fees. Standard: $749 a month plus data fees. Enterprise: inquire. Inventory Search is $0.002 a call and MarketCheck Price $0.07 a call (pricing).

3. Canadian Black Book

A set of valuation APIs. The Used Car Web API returns wholesale, trade-in, retail, private party, residual, end-of-term and finance advance values, plus VIN decoding. Other APIs cover retail market insights, custom trade values, new cars, recreational vehicles and collectible cars, with output in JSON and XML (API). Its developer portal lists the Used Car, New Car and Retail Web APIs as available through GraphQL (developer portal).

Pricing and status. No price published. "All Black Book customers get access to our Developer Portal," and new buyers are directed to "Talk to a Product Specialist" (API). Sales-led.

4. VinAudit

A Market Values API that takes a VIN, mileage, a condition, a look-back period of up to 365 days, and a country of usa or canada, and returns a mean, a standard deviation (stdev) and the count of data points (Market Values).

Pricing and status. Not stated on the Market Values page (Market Values). Public docs.

5. CarsXE

A Market Value API that returns wholesale, retail and trade-in values by condition tier, low, average and high auction values, and a loan value for a VIN, with optional mileage, condition and US state (Market Value).

Pricing and status. Sandbox includes 5 Market Value calls lifetime. Starter (US$40.83 a month billed annually) and Pro (US$207.50 a month billed annually) price Market Value by overage; Business is "Contact Us" (pricing).

6. Auto.dev

A Vehicle Listings API with listings "from U.S. physical & online dealers," filtered on make, model, year, price, mileage and more, with ZIP and distance search (Vehicle Listings).

Pricing and status. Free: 1,000 calls a month across VIN decode, listings and photos. Growth: US$299 a month plus US$0.0015 per listings call. Scale: US$599 plus US$0.001 (pricing).

7. Vehicle Databases

A Vehicle Market Value API that returns "trade-in, private party, and dealer retail values for every condition tier," by VIN or by year, make and model, with mileage and state, for "US vehicles, 1981 to present" (Market Value).

Pricing and status. "Pay as you go, monthly, and yearly subscription plans," with a trial of 15 free credits (home).

Why Cardog is first

Canadian market, Canadian units. Listings default to CAD with a radius in kilometres.
Exact filters. Refs and canonical specs filter listings, and an unknown ref is named in a 400 instead of returning a quiet empty page.
Numbers you can weigh. Every quote carries its sample size (liveCount) and its asOf time, with quartiles and days on market.
History as well as the present. Daily price bars through the tape.
One graph. Listings and quotes share refs with the VIN decode, recalls and spec sheets, so a single key answers the next question.

FAQ

Which market-data APIs return Canadian prices in CAD? Cardog's listing prices default to CAD. MarketCheck Price has Canadian endpoints that report in CAD.

What is in a Cardog market quote? The live listing count, best price, 25th percentile, median and 75th percentile asking prices, average days on market, recent price cuts and the time it was computed. See Market data.

How is Cardog's market data billed? Each listings request is 1 credit. Each quote request is 5 credits, and one request can quote up to 20 refs.

What is the difference between asking prices and a valuation? Asking prices are what sellers list vehicles for today. A valuation estimates what one vehicle is worth from its details. See How used-car prices are measured.

Can I filter Cardog listings on equipment or specs? Yes. Listings filter on refs and canonical specs, and facets count over the same set.

Sources

Checked on 2026-10-26:

MarketCheck, Cars API index: https://docs.marketcheck.com/docs/api/cars
MarketCheck, Inventory Search: https://docs.marketcheck.com/docs/api/cars/inventory/inventory-search
MarketCheck, MarketCheck Price: https://docs.marketcheck.com/docs/api/cars/market-insights/marketcheck-price
MarketCheck, Pricing: https://www.marketcheck.com/pricing
Auto.dev, Vehicle Listings API: https://docs.auto.dev/v2/products/vehicle-listings
Auto.dev, Pricing: https://www.auto.dev/pricing
VinAudit, Market Values API: https://data.vinaudit.com/docs/api/market/values
CarsXE, Market Value: https://docs.carsxe.com/docs/products/market-value
CarsXE, Pricing: https://carsxe.com/pricing
Canadian Black Book, API: https://www.canadianblackbook.com/api/
Canadian Black Book, Developer Portal: https://developer.canadianblackbook.com/
Vehicle Databases, Vehicle Market Value API: https://vehicledatabases.com/api/vehicle-market-value
Vehicle Databases, home page and FAQ: https://vehicledatabases.com/

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