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CarsXE

https://api.carsxe.com/specs?vin=WBAFR7C57CC811956
● healthy data

Production vehicle data for agents. VIN and international plate decode, open vs completed recalls, market value, OCR. Unpaid calls return HTTP 402; agents pay with x402 (USDC on Base) with no API key.

Category
data
Chains
base, eip155:8453
Price
$0.1500 USDC / call

Quality grade

How grading works
B 62.6 / 100
Availability 20.0 / 20
Endpoint responded (HTTP 402)
Payability 15.0 / 15
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✓ Price declared
Demand 4.6 / 35
1 distinct payers, 5 USDC transfers in the last 30 days
Performance 10.0 / 10
Last probe answered in 130 ms (full marks at 200 ms or less)
Readiness 13.0 / 15
Agent readiness 87/100
Owner verified 0.0 / 5
Nobody has claimed this listing yet
Endpoint last checked 19 h ago. On-chain activity last read 3 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass. This grade sets search order and leaderboards; the readiness score below is shown for reference only.

x402 readiness

B · 87/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here B, 62.6/100), which weighs availability, payability and on-chain demand. How the two differ

Valid payment requirements 10/10 Payment requirements carry a payee, a mainnet network and a price.
Live 402 challenge 25/25 Paid endpoint answers with an HTTP 402 challenge (130 ms).
x402 version n/a x402 version not observed yet.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 14.06/15 30/32 probes succeeded over 30 days (94%).
Resource declaration 10/10 Declares 5 paid resource(s).
Verified identity 5/10 Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags 1/5 not seen in a source for over 30 days; declares x402.
Security declaration n/a Payment is the access control for an x402 resource.
Applicable criteria total 75 points, scaled to 100.
Responsiveness: Responsive (130 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).
Payment evidence: x402_challenge — We sent a request and got a live HTTP 402 challenge. Also: x402_manifest, catalog_listing. Qualifies the payment claim; adds no points.
Measured 2026-11-11.
Nine criteria, the same as the A2A readiness score, read from our daily probe of the paid endpoint, its payment requirements and 30-day probe history. Signed descriptor and security declaration are n/a for x402 (payment is the access control), as is an x402 version we have not observed; the remaining points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. It also feeds 15 points of the x402 quality grade.

Compared with peers

Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness
Higher than 75% of peers
This listing 87 · peer median 78
Latency
Faster than 75% of peers
This listing 130 ms · peer median 205 ms

Where it loses the most points, and how to win them back

  • Verified identity −5 — Claim the listing and prove control of its domain.
    Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
  • Freshness + modern flags −4 — Keep the listing current in the registry or source it comes from.
    Now: not seen in a source for over 30 days; declares x402.
  • Uptime (30 days) −0.9 — Stay reachable in our daily probes.
    Now: 30/32 probes succeeded over 30 days (94%).

How many agent tools actually work · All statistics

Paid endpoints

5 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.

GET https://api.carsxe.com/specs

Vehicle specifications and VIN decode

GET https://api.carsxe.com/v1/international-vin-decoder

International VIN decoder

GET https://api.carsxe.com/v1/recalls

Vehicle safety recalls

GET https://api.carsxe.com/v2/marketvalue

Vehicle market value

GET https://api.carsxe.com/v2/platedecoder

License plate decoder

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET 'https://api.carsxe.com/specs?vin=WBAFR7C57CC811956'  # expect HTTP 402 Payment Required (about 0.15 USDC/call)
/.well-known/x402.json
https://api.carsxe.com/.well-known/x402

Listed in

Directories this entry was found in.

submission since 2026-09-03 x402scan since 2026-09-13