preflight?url=https%3A%2F%2Fexample.com%2Fpaid-endpoint

Preflight an unfamiliar x402 paid API before spending.

Preflight an unfamiliar x402 paid API before spending. Validate the live 402 payment challenge, network, USDC asset, amount, payTo recipient, TLS, redirects, manifest presence, latency, and provenance. Returns deterministic GO/REVIEW/STOP and never signs or sends payment to the inspected seller.

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.001 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x5deaebaf…1c42ef0a

URL

https://pennyregwatch.com/v1/x402/preflight?url=https%3A%2F%2Fexample.com%2Fpaid-endpoint

Seen

first 8 days ago · last 13 hr ago

14 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC

Listed on?

Base

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.660 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held back by sample size, not by the seller · gap to 1.000 is 0.340: 0.284 uncertain ? + 0.057 short ? · 0.140 to B

How the composite of 0.660 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
livenesscosts the most it answered at all	0.60	1.00	0.527		0.316	0	−0.284
latency p95 it answered as fast as its class	0.20	0.72	0.717		0.143	−0.057	0
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.660	gap to 1.000 = 0.340 · 0.057 short · 0.284 uncertain	0.660	−0.057	−0.284

Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check

The multiplication, written out

  0.600 × 0.527   liveness       
+ 0.200 × 0.717   latency p95    
+ 0.200 × 1.000   price stability
= 0.660           → UNRATED: 13 of 30 paid calls      weights 2026.09.6 · 13 samples · seed cap_01M3E3VHY7H7RF5MWN88QNG8KM|2026-09-03T23:18:17.622Z|2026.09.6

Verify it yourselfnpx teppi-check https://pennyregwatch.com/v1/x402/preflight?url=https%3A%2F%2Fexample.com%2Fpaid-endpointcurl -s https://api.teppi.xyz/v1/trust/cap_01M3E3VHY7H7RF5MWN88QNG8KM