Auto.dev vs Vehicle Databases for AI agents
Auto.dev is a REST API for active vehicle listings from US dealers, part of a wider set of automotive APIs (VIN decode, photos, specs, recalls, payments). 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
- Auto.dev: Getting a small project or AI agent searching US dealer listings quickly, with a free tier and a ready-made MCP server.
- Vehicle Databases: Checking the past listing and sale history and value of a specific VIN.
Side by side
| Auto.dev | Vehicle Databases | |
|---|---|---|
| Searches | Active listings from US physical and online dealers, filtered by make, model, year, price, mileage, state, CPO status and ZIP plus distance. | 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 VIN, year, make, price, location and created/updated dates; the full field schema was collapsed in the public docs, so dealer contact fields could not be confirmed. | 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 | An Auto.dev account and API key from the dashboard; the free plan needs only email verification, no card. | A free sign-up, which gives an API key and starter credits. |
| Free | Free plan with 1,000 API calls a month at 5 requests a second, no card required (listings capped at 20 per page). | 15 free credits and an API key on sign-up. |
| Paid | Growth plan $299 a month; Scale plan $599 a month. | Not stated on its pages |
| Acting on a result | Not stated on its pages | 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 | Data is licensed solely for internal business purposes; no reselling or redistributing to third parties and no derivative databases or competing data products. No clause specifically on caching. | Not stated on its pages |
| Coverage | United States dealers. | United States. |
| MCP server | Official MCP server at https://mcp.auto.dev/mcp (OAuth sign-in or API key); listing search tool available on the free plan. | 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 Auto.dev?
An Auto.dev account and API key from the dashboard; the free plan needs only email verification, no card.
Is Auto.dev free?
Free plan with 1,000 API calls a month at 5 requests a second, no card required (listings capped at 20 per page).
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.
Auto.dev, read on October 15, 2026:
- docs.auto.dev/v2/getting-started: “1,000 API calls per month, no card required”
- docs.auto.dev/v2/getting-started: “$299/month with unlimited calls”
- docs.auto.dev/v2/getting-started: “$599/month with enterprise features”
- docs.auto.dev/v2/getting-started: “Free needs no checkout — verify your email address and your API key is ready.”
- docs.auto.dev/v2/products/vehicle-listings: “Get comprehensive vehicle listings from U.S. physical & online dealers in seconds.”
- docs.auto.dev/v2/products/vehicle-listings: “filter by make, model, year, price, mileage, and more”
- docs.auto.dev/v2/mcp-quickstart: “claude mcp add --transport http auto-dev https://mcp.auto.dev/mcp”
- auto.dev/terms: “You receive a limited, non-exclusive license to use Automotive Data solely for your internal business purposes”
- auto.dev/terms: “You may not create derivative databases or competing data products”
- auto.dev/terms: “Resell, redistribute, or sublicense our Automotive Data to third parties”
- auto.dev/pricing: “Free $0 per month Get 1,000 API calls per month for evaluation and small projects”
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”