Auto.dev vs Cars.com 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). Cars.com is a US car marketplace for dealer listings; it offers no public developer or listings API.
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.
- Cars.com: Shopping on the website itself; there is no sanctioned programmatic route for third-party developers.
Side by side
| Auto.dev | Cars.com | |
|---|---|---|
| Searches | Active listings from US physical and online dealers, filtered by make, model, year, price, mileage, state, CPO status and ZIP plus distance. | – |
| 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. | – |
| Before the first call | An Auto.dev account and API key from the dashboard; the free plan needs only email verification, no card. | – |
| Free | Free plan with 1,000 API calls a month at 5 requests a second, no card required (listings capped at 20 per page). | – |
| Paid | Growth plan $299 a month; Scale plan $599 a month. | – |
| 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. | Site terms bar robots, crawlers and scraping, and any reuse or redisplay of the service without permission. |
| 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. | – |
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).
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”
Cars.com, read on October 15, 2026:
- cars.com/contact: “Become a Cars.com car dealer”
- cars.com/about/terms: “web robots, crawlers or spiders to access, query or otherwise collect information or scrape data from the Site”
- cars.com/about/terms: “Use of the Site or any portion thereof on any other website is expressly prohibited without prior written permission from Cars Commerce.”