MarketCheck Cars API vs Vehicle Databases for AI agents
MarketCheck Cars API is a paid REST API of new, used and certified car listings collected from dealer and other source websites, plus dealer, VIN and market-statistics endpoints. Vehicle Databases is a set of 25+ vehicle data APIs (VIN decode, market value, history, sales and auction history, recalls); its Used Car API looks up past listings by VIN rather than searching cars for sale.
The short answer
- MarketCheck Cars API: Searching current US dealer inventory at scale with price, mileage, photos and a link back to the dealer's listing page.
- Vehicle Databases: Checking the past listing and sale history and value of a specific VIN.
Side by side
| MarketCheck Cars API | Vehicle Databases | |
|---|---|---|
| Searches | Active new, used and certified dealer listings in the US, recent dealer inventory (last 90 days) in the US and Canada, private-party and auction listings, and dealers by location. | Data for one vehicle by VIN (and year/make/model for market value); no search of current inventory by location or make. |
| Returns | Listing records with price, miles, seller name, seller type, photo URLs and a link to the original vehicle details page, plus specs and dealer details. | For the Used Car API: previous listings, asking prices, mileage, listing dates, seller details and photos where available, plus market values. |
| Before the first call | A MarketCheck developer account and API key from the Developers Portal. | A free sign-up, which gives an API key and starter credits. |
| Free | Free plan at $0 a month with 500 calls a month and a 100-mile search radius limit. | 15 free credits and an API key on sign-up. |
| Paid | Basic plan $299 a month plus per-call data fees (inventory search is $0.002 a call). | Not stated on its pages |
| Acting on a result | Each listing carries the seller name and a link (vdp_url) to the vehicle details page on the source site; no dealer phone field is defined in the data definitions. | Sales history records include seller type and seller details (such as dealer name), but these are past listings, not live offers. |
| Limits on keeping or showing results | No caching, storing, indexing or persisting of substantial portions of the data; no independent or persistent datasets outside the service. | Not stated on its pages |
| AI in its terms | Data may not be used to train, fine-tune or improve generalized ML or AI models, but may be used inside AI applications when accessed in real time. | Not stated on its pages |
| Coverage | United States for active inventory search; US and Canada for recent dealer, private-party and auction inventory; the MCP docs also list the UK. | United States. |
| MCP server | Official hosted MCP server at https://api.marketcheck.com/mcp?api_key=YOUR_API_KEY (needs an API key; covers US, Canada and UK). | No official server listed |
Where Openpath fits
Openpath has no car listings yet. Cars are on its roadmap, from sellers and dealers who list them themselves. Get listed.
Questions people ask
What do I need before I can use MarketCheck Cars API?
A MarketCheck developer account and API key from the Developers Portal.
Is MarketCheck Cars API free?
Free plan at $0 a month with 500 calls a month and a 100-mile search radius limit.
What do I need before I can use Vehicle Databases?
A free sign-up, which gives an API key and starter credits.
Is Vehicle Databases free?
15 free credits and an API key on sign-up.
Sources
Every line about another company comes from its own pages. Prices and terms change, so check the source before you rely on one.
MarketCheck Cars API, read on October 15, 2026:
- marketcheck.com/apis/pricing: “$0 /mo ... 500 calls per month”
- marketcheck.com/apis/pricing: “100 mile radius restriction”
- marketcheck.com/apis/pricing: “$299 /mo + data fee”
- marketcheck.com/apis/pricing: “$0.002”
- marketcheck.com/apis/cars: “Lookup New / Used / Certified cars for sale in US”
- marketcheck.com/apis/cars: “New / Used dealer cars for sale in US & Canada from last 90 days”
- docs.marketcheck.com/docs/guides/data/cars/inventory/data-definitions: “The URL of the Vehicle Details Page (VDP)”
- docs.marketcheck.com/docs/guides/data/cars/inventory/data-definitions: “The name of the dealership or seller, as displayed on the source website.”
- docs.marketcheck.com/docs/guides/data/cars/inventory/data-definitions: “The name of the source website from which the vehicle listing was scraped.”
- docs.marketcheck.com/docs/get-started/api/mcp/getting-started.md: “https://api.marketcheck.com/mcp?api_key=YOUR_API_KEY”
- marketcheck.com/terms_of_service: “Cache, store, index, or otherwise persist substantial portions of data obtained through the Service”
- marketcheck.com/terms_of_service: “Use MarketCheck data to train, fine-tune, or improve any generalized machine learning or artificial intelligence models”
- marketcheck.com/terms_of_service: “You may use MarketCheck data within applications that utilize AI models, provided the data is accessed in real time”
Vehicle Databases, read on October 15, 2026:
- vehicledatabases.com: “You will immediately receive 15 free credits and your API key to access information on different vehicles”
- vehicledatabases.com: “trucks, trailers, and more vehicles sold in the United States”
- vehicledatabases.com/api/used-car: “including previous listings, asking prices, mileage, listing dates, seller details, and photos where available”
- vehicledatabases.com/api/used-car: “Submit a 17-character VIN to either API”