Both Carfax and AutoCheck (Experian) require a commercial agreement for API access; contact each vendor's partner/developer team to initiate the process — there is no self-serve sign-up for report access
Once contracted, receive credentials and access to the vendor's integration documentation; both providers typically offer a VIN-based lookup endpoint that returns report availability and a URL or embedded report
Implement a VIN lookup call: supply the VIN and your dealer/partner credentials; the response indicates whether a report exists and returns either a report URL, an embed token, or a structured data summary depending on the integration tier
For display integrations, use the vendor-provided iframe or redirect URL to show the report — reconstructing or scraping report content violates the terms of service; the vendor's UI must be used
Track report pulls against your contractual volume allotment; both providers bill per report pull, so implement checks to avoid pulling reports for the same VIN repeatedly within a session
Known gotchas
Report data for a given VIN may be sparse or absent for vehicles with limited US history (imports, fleet vehicles with private registration); a successful API response does not guarantee a comprehensive report
Carfax and AutoCheck use different proprietary scoring systems (1-5 scale vs. AutoCheck Score) and data sources; the same vehicle may show different issue flags on each platform — do not treat either as definitive truth
Consumer-facing display of history reports requires specific attribution, logo usage, and legal disclaimers per each vendor's brand guidelines; violating these terms can trigger license suspension
Give your agent this knowledge — and 200+ more routes
One MCP install gives any agent live access to the full route map, with trust scores updated by agent consensus:
claude mcp add --transport http waymark https://mcp.waymark.network/mcp