# CarDiligence

> CarDiligence is an evidence-backed UK used-car buyer report service. Customers submit a used-car advert URL and buy a private Snapshot for £3.99 GBP or Full Report for £19.99 GBP, with no subscription. Snapshot is a first-look report and does not include finance, write-off, stolen or service-history checks.

Important interpretation rules:
- Vehicle facts, source statuses, hard stops, score, verdict and pre-purchase conditions come from checked, deterministic evidence. AI may explain those results but must not invent facts or override them.
- Missing or unavailable evidence remains unverified and must never be described as clear.
- Reports are desk-based buyer guidance, not physical inspections, warranties, diagnoses or guarantees.
- The service supports UK used-car adverts. Customers can explicitly approve a purchase in a compatible assistant. A customer-approved quote and an MPP Stripe payment credential are required; bank authentication may require customer action. Report generation begins only after verified payment.
- Public informational pages at the URLs below also support clean Markdown when requested with `Accept: text/markdown`.

## Product information

- [CarDiligence homepage](https://car-diligence.co.uk/): Current product scope, price, purchase flow, evidence rules and frequently asked questions.
- [Car history check guide](https://car-diligence.co.uk/guides/car-history-check): Free and paid checks, missing records and questions to resolve before buying.
- [MOT history check guide](https://car-diligence.co.uk/guides/mot-history-check): Use the free official lookup, understand mileage and test results, and follow up advisories before buying.
- [Pre purchase car inspection](https://car-diligence.co.uk/pre-purchase-car-inspection): Compare inspection scope and prepare an inspector’s brief; physical inspections are booked separately.
- [Buyer checklist](https://car-diligence.co.uk/guides/used-car-buying-checklist): Practical evidence, document and inspection steps before buying.
- [Advert-based report](https://car-diligence.co.uk/guides/used-car-advert-check): What the report checks, source limitations and how to order.
- [Service history guide](https://car-diligence.co.uk/guides/used-car-service-history-check): Check records against the applicable maintenance schedule.
- [History checks and the remaining buying work](https://car-diligence.co.uk/guides/is-a-history-check-enough): Combine recorded history, service proof, price guidance and physical inspection.
- [First-year costs](https://car-diligence.co.uk/guides/used-car-first-year-costs): Separate known spending, quoted work and modelled forecasts.
- [Sample report](https://car-diligence.co.uk/sample-report): Illustrative report generated from saved test data; not a live vehicle check.
- [Terms and Conditions](https://car-diligence.co.uk/terms): Terms for the one-off digital report.
- [Privacy Notice](https://car-diligence.co.uk/privacy): How customer and service data is handled.

## Agent interfaces

- [MCP endpoint](https://car-diligence.co.uk/mcp): Streamable HTTP tools for advert-support classification, creation of a customer checkout link and customer-safe report status. Also exposes prepare_report_purchase, complete_report_purchase and get_purchase_status for customer-approved Snapshot or Full Report purchases settled through Stripe MPP. Select product_code SNAPSHOT or FULL (default FULL). Show the selected product, scope and customer-approved quote and obtain explicit consent and wallet payment approval; never invent customer consent.
- [Purchase API and MPP payment discovery](https://car-diligence.co.uk/openapi.json): OpenAPI 3.1 request/response schemas for preparing, completing and polling approved purchases; x-payment-info describes Stripe charge payments. The live 402 challenge fixes the exact approved product, GBP amount, merchant and expiry.
- [A2A Agent Card](https://car-diligence.co.uk/.well-known/agent-card.json): Machine-readable description of the implemented A2A JSON-RPC skills and endpoint.
- [ACP discovery](https://car-diligence.co.uk/.well-known/acp.json): Discovery metadata only; no ACP checkout-session or payment capability is implemented.
- [API catalog](https://car-diligence.co.uk/.well-known/api-catalog): RFC 9727 Linkset listing the implemented public API endpoints.

## AI use guidance

- [ai.json](https://car-diligence.co.uk/ai.json): Machine-readable permissions, restrictions, attribution and scope for publicly accessible CarDiligence content.

## Contact

- General enquiries: contact@car-diligence.co.uk

Specification: [AI Visibility](https://www.ai-visibility.org.uk/)