Endpoint · market dataGETx402-used-car-quickcheck-production.up.railway.app /car-check ?country=CA&make=Tesla&mileage=68000&model=Model+3&price=28000&state=ON&trim=Long+Range&year=2022
Evaluate a used car before purchase.
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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.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.01 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://x402-used-car-quickcheck-production.up.railway.app/car-check?country=CA&make=Tesla&mileage=68000&model=Model+3&price=28000&state=ON&trim=Long+Range&year=2022
Seen
first 35 days ago · last 24 days ago
33 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC, Solana
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.1
UN
RATED
RATED
0.429 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by liveness · gap to 1.000 is 0.571: 0.109 uncertain ? + 0.462 short ? · 0.021 to D
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 0.56 | 0.381 | 0.229 | −0.262 | −0.109 | |
| latency p95 it answered as fast as its class |
0.20 | 0.00 | 0.000 | 0.000 | −0.200 | 0 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.429 | gap to 1.000 = 0.571 · 0.462 short · 0.109 uncertain | 0.429 | −0.462 | −0.109 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.381 liveness
+ 0.200 × 0.000 latency p95
+ 0.200 × 1.000 price stability
= 0.429 → UNRATED: 32 of 30 paid calls weights 2026.09.1 · 32 samples · seed cap_01M1A5Q9Z2WP44EAD77M1M9F4T|2026-08-17T23:16:22.948Z|2026.09.1
Verify it yourself
npx teppi-check https://x402-used-car-quickcheck-production.up.railway.app/car-check?country=CA&make=Tesla&mileage=68000&model=Model+3&price=28000&state=ON&trim=Long+Range&year=2022curl -s https://api.teppi.xyz/v1/trust/cap_01M1A5Q9Z2WP44EAD77M1M9F4T