x402-used-car-quickcheck-production.up.railway.app
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.
InferenceLiveeip155:8453Exactvia cdp
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 18 snapshots so far.
$2.04
Verified settled volume
8 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-12 00:24Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x735f74EdE4361788D6634925D592711463be8164The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.01USDC≈ $0.01 USD
on Base · exact scheme
Pay 0.01 USDC on Base to 0x735f…e8164. The signed payment is good for 5 minutes.
- Paid to
- 0x735f…e8164
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x735f74EdE4361788D6634925D592711463be8164",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"make": "Tesla",
"trim": "Long Range",
"year": 2022,
"model": "Model 3",
"price": 28000,
"state": "ON",
"country": "CA",
"mileage": 68000
}
},
"output": {
"type": "json",
"example": {
"market": {
"city": null,
"state": "ON",
"country": "CA",
"currency": "CAD"
},
"pricing": {
"median": 32900,
"observed_max": 37995,
"observed_min": 28900,
"quartile_low": 30995,
"quartile_high": 34995
},
"service": "Used Car QuickCheck",
"vehicle": "2022 Tesla Model 3 Long Range",
"version": "2.0.0",
"matching": {
"trim_applied": true,
"location_applied": true,
"mileage_range_km": {
"maximum": 92140,
"minimum": 43859
}
},
"position": {
"rating": "GOOD DEAL",
"confidence": "HIGH",
"confidence_score": 84,
"difference_percent": -14.89,
"difference_from_median": -4900,
"estimated_savings_vs_median": 4900
},
"mileage_km": 68000,
"risk_flags": [],
"comparables": {
"raw_count": 42,
"analyzed_count": 39,
"outliers_removed": 3,
"market_total_matches": 116
},
"methodology": "Median and quartiles of mileage-matched active dealer asking prices after IQR outlier filtering.",
"asking_price": 28000,
"data_freshness": "live",
"payment_network": "Base Mainnet"
}
}
},
"schema": {
"type": "object",
"$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 for a more localized market comparison."
},
"make": {
"type": "string",
"description": "Vehicle manufacturer, for example Tesla, Toyota, BMW, Ford or Honda."
},
"trim": {
"type": "string",
"description": "Optional trim for tighter matching, for example Long Range, LE, EX or M Sport."
},
"year": {
"type": "integer",
"maximum": 2030,
"minimum": 1980,
"description": "Vehicle model year."
},
"model": {
"type": "string",
"description": "Vehicle model, for example Model 3, Camry, Civic or 3 Series."
},
"price": {
"type": "number",
"description": "Seller asking price in CAD for Canada or USD for the United States.",
"exclusiveMinimum": 0
},
"state": {
"type": "string",
"description": "Optional province/state code, for example ON, BC, CA or NY."
},
"country": {
"enum": [
"CA",
"US"
],
"type": "string",
"default": "CA",
"description": "Comparison market. CA = Canada, US = United States."
},
"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",
"required": [
"country",
"currency",
"state",
"city"
],
"properties": {
"city": {
"type": [
"string",
"null"
]
},
"state": {
"type": [
"string",
"null"
]
},
"country": {
"enum": [
"CA",
"US"
],
"type": "string"
},
"currency": {
"enum": [
"CAD",
"USD"
],
"type": "string"
}
}
},
"pricing": {
"type": [
"object",
"null"
],
"properties": {
"median": {
"type": "number"
},
"observed_max": {
"type": "number"
},
"observed_min": {
"type": "number"
},
"quartile_low": {
"type": "number"
},
"quartile_high": {
"type": "number"
}
}
},
"service": {
"type": "string"
},
"vehicle": {
"type": "string"
},
"version": {
"type": "string"
},
"matching": {
"type": "object",
"required": [
"mileage_range_km",
"trim_applied",
"location_applied"
],
"properties": {
"trim_applied": {
"type": "boolean"
},
"location_applied": {
"type": "boolean"
},
"mileage_range_km": {
"type": "object",
"required": [
"minimum",
"maximum"
],
"properties": {
"maximum": {
"type": "integer"
},
"minimum": {
"type": "integer"
}
}
}
}
},
"position": {
"type": "object",
"required": [
"difference_from_median",
"difference_percent",
"rating",
"confidence",
"confidence_score"
],
"properties": {
"rating": {
"enum": [
"EXCELLENT DEAL",
"GOOD DEAL",
"FAIR PRICE",
"ABOVE MARKET",
"OVERPRICED",
"INSUFFICIENT DATA"
],
"type": "string"
},
"confidence": {
"enum": [
"HIGH",
"MEDIUM-HIGH",
"MEDIUM",
"LOW"
],
"type": "string"
},
"confidence_score": {
"type": "integer",
"maximum": 100,
"minimum": 0
},
"difference_percent": {
"type": [
"number",
"null"
]
},
"difference_from_median": {
"type": [
"number",
"null"
]
},
"estimated_savings_vs_median": {
"type": [
"number",
"null"
]
}
}
},
"mileage_km": {
"type": "integer"
},
"risk_flags": {
"type": "array",
"items": {
"type": "string"
}
},
"comparables": {
"type": "object",
"required": [
"raw_count",
"analyzed_count",
"outliers_removed",
"market_total_matches"
],
"properties": {
"raw_count": {
"type": "integer"
},
"analyzed_count": {
"type": "integer"
},
"outliers_removed": {
"type": "integer"
},
"market_total_matches": {
"type": [
"integer",
"null"
]
}
}
},
"methodology": {
"type": "string"
},
"asking_price": {
"type": "number"
},
"data_freshness": {
"type": "string"
},
"payment_network": {
"type": "string"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-12 00:24Z
- Last indexed by Roundhouse
- 2026-09-11 00:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 05:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 18 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service x402-used-car-quickcheck-production.up.railway.app and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=x402-used-car-quickcheck-production.up.railway.app' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://x402-used-car-quickcheck-production.up.railway.app/car-check, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.