{"uid":"cap_nVOO5hCImzeZNUZaF6U46","slug":"used-car-quickcheck-3f26dc01","name":"Used Car QuickCheck","description":"Evaluate a used car before purchase. Compares the asking price with up to 50 current dealer listings in Canada or the U.S., matched by year, make, model, mileage and optional trim/location. Returns robust median and quartile pricing, deal rating, confidence, sample size and risk flags. Use for used-car price checks, negotiation prep and market comparisons.","url":"https://x402-used-car-quickcheck-production.up.railway.app/car-check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["make","model","year","mileage","price"],"properties":{"city":{"type":"string","description":"Optional city."},"make":{"type":"string","description":"Vehicle manufacturer."},"trim":{"type":"string","description":"Optional trim."},"year":{"type":"integer","maximum":2030,"minimum":1980,"description":"Vehicle model year."},"model":{"type":"string","description":"Vehicle model."},"price":{"type":"number","description":"Asking price in CAD for CA or USD for US.","exclusiveMinimum":0},"state":{"type":"string","description":"Optional province/state code."},"country":{"enum":["CA","US"],"type":"string","default":"CA","description":"Comparison market."},"mileage":{"type":"integer","minimum":0,"description":"Current odometer reading in kilometres."}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["service","version","vehicle","market","asking_price","mileage_km","matching","comparables","pricing","position","risk_flags","methodology","data_freshness","payment_network"],"properties":{"market":{"type":"object"},"pricing":{"type":["object","null"]},"service":{"type":"string"},"vehicle":{"type":"string"},"version":{"type":"string"},"matching":{"type":"object"},"position":{"type":"object"},"mileage_km":{"type":"integer"},"risk_flags":{"type":"array","items":{"type":"string"}},"comparables":{"type":"object"},"methodology":{"type":"string"},"asking_price":{"type":"number"},"data_freshness":{"type":"string"},"payment_network":{"type":"string"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ktd8au8HvpzJ_Lmr0paxd","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Compares a used car's asking price against up to 50 current dealer listings in Canada or the US, returning market pricing statistics, deal rating, and risk flags.","exampleAgentPrompt":"I'm looking at a 2020 Toyota Camry LE with 85,000 km on it and the dealer is asking $24,500 CAD in Ontario, Canada — can you run a market price check and tell me if it's a fair deal?","exampleUseCases":[{"title":"Pre-purchase negotiation prep","prompt":"I'm about to go negotiate on a 2019 Honda Civic EX with 72,000 km, asking price is $18,900 CAD in British Columbia — can you check what the market looks like and give me ammo for negotiating?"},{"title":"Cross-border price comparison","prompt":"I found a 2021 Ford F-150 XLT with 55,000 km listed at $42,000 USD in New York state — is that a good price compared to what dealers are actually selling similar trucks for in the US?"},{"title":"Private seller price validation","prompt":"Someone's selling a 2018 BMW 3 Series M Sport with 90,000 km for $28,000 CAD in Toronto — can you compare that to current dealer listings and flag any red flags?"}],"resultDescription":"Returns a structured JSON object with: matched vehicle details, market country and currency, asking price vs. median/quartile dealer prices, deal rating (e.g. great deal, fair, overpriced), confidence score, number of comparable listings found (up to 50), and risk flags such as high mileage or limited comparables.","failureModes":["Insufficient comparable listings found (low sample size reduces confidence)","Invalid or unrecognized make/model/year combination returns an error","Mileage provided in wrong unit (miles instead of km) leads to skewed results","Price provided in wrong currency for the selected country","Year outside supported range (1980–2030) rejected","Missing required fields (make, model, year, mileage, price) returns validation error","Payment failure (x402 protocol) if USDC balance is insufficient"],"whenToPreferThis":"Choose this endpoint when you need a fast, low-cost ($0.01 USDC) used car market valuation backed by up to 50 real dealer listings in Canada or the US. It is ideal for pre-purchase deal assessment, negotiation preparation, and quick price sanity checks. Prefer it over generic price guides when you need quartile pricing, a deal rating with confidence score, and risk flags tailored to specific mileage and trim.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:37:46.347Z","isFirstParty":false,"canonicalSlug":"used-car-quickcheck-3f26dc01"}