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Used Car DeepCheck – Pre-Purchase Valuation & Deal Analysis API
x402
Used Car DeepCheck – Pre-Purchase Valuation & Deal Analysis API is a paid API for AI agents from ideal-eagerness-production-9462.up.railway.app, paid per call via x402, $0.99/call, status unknown (last checked 2026-09-15).
Analyzes a used car listing to determine if the asking price is fair, compares live dealer comparables, and returns a BUY, NEGOTIATE, or WALK AWAY decision with market value estimates for US and Canadian markets.
Price / call$0.99
Success—
StatusUnknown
How this service works
Used Car DeepCheck is an AI-ready pre-purchase used car valuation, vehicle pricing, and deal analysis API for buyers and agents. Use it before buying a used car to check if the asking price is fair, compare live dealer listings, estimate market value, fair value, negotiation target, and maximum buy price, then return BUY, NEGOTIATE, or WALK AWAY. Supports Canada and U.S. markets with optional VIN, mileage, trim, location, listing history, and market-turnover intelligence.
Output
Returns a structured JSON object including the vehicle identification, market value, fair value, negotiation target price, maximum buy price, a BUY/NEGOTIATE/WALK AWAY decision, comparable dealer listings, market turnover intelligence, listing history signals, risk flags, confidence score, and methodology/disclaimer notes.
Example use cases
Pre-purchase negotiation prep at dealership
“I'm about to visit a franchise dealer tomorrow about a 2021 Toyota RAV4 XLE with 55000 km, they're asking $38,000 CAD in Vancouver BC — run a DeepCheck so I know my negotiation target and what's a fair max price before I go in.”
Remote buyer checking a private-sale listing
“I found a 2018 Ford F-150 XLT on Kijiji, 95000 km, asking $34,500 CAD in Calgary Alberta, VIN is 1FTEW1EP3JKE12345, independent seller — is this a good deal or should I walk away?”
Cross-border US car buying decision
“There's a certified pre-owned 2020 Subaru Outback Premium at a franchise dealer in Seattle WA, 42000 miles, asking $27,900 USD — can you check if that's a fair price and tell me what comparable cars are selling for nearby?”
Technical details
Endpoint
GEThttps://ideal-eagerness-production-9462.up.railway.app/deep-checkWhen to prefer
Choose this endpoint when an AI agent or buyer needs a structured, decision-ready used car valuation with explicit BUY/NEGOTIATE/WALK AWAY guidance for Canadian or US markets. It is superior to generic price guides when you need live comparable listings, negotiation targets, risk flags, and market turnover data in a single API call. Best suited for pre-purchase decision support where the user has the make, model, year, mileage, and asking price in hand.
Side effects
- Missing required fields (make, model, year, mileage, price) returns a 400 validation error
- Invalid VIN format (not 17 characters) rejected with schema error
- Unsupported country code returns enum validation failure
- No comparable listings found for rare or obscure vehicles may reduce confidence score
- Payment not processed (x402 payment required) returns 402 before any valuation is run
- Mileage value of 0 or implausibly low may skew market comparison results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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