402sentinel.com

81.5 / 100 · rank 1412 of 1545

last 120 hours · short tick = valid 402 · full tick = invalid or no answer · faint = not probed

score components (0-100) · not the raw measurements below

Availability76

Latency65

Price integrity100

Protocol100

Consistency75

Availability is the one component that is a success rate, so it alone carries an evidence discount: it enters as the 95% Wilson lower bound of the measured share (cubed), which is why its bar reads below the raw percentage above — thin evidence scores below a long proven record. Latency, price, protocol and consistency are direct measurements, shown as-is.

Availability (valid 402 returned)	98.4% of 61 probes · single vantage
Median 402 handshake	841ms
p90 handshake	891ms
Catalog price (advertised)	$0.002
Live price (median demanded)	$0.002
Price status	match
Protocol	x402 v2
Category (our classification)	commerce-payments
Payment receiver	0x1A9F…6dE5 (+1 more) · changed 1× since Jul 12
Base USDC settlement to this receiver wallet (30d' measured by us)	x402-plausible (amount matches a listed price): $0 · 8 transfers · 1 distinct senders. All USDC inflow' upper bound incl. non-x402: $0 · 8 transfers.
Discovery (.well-known/x402)	present
Catalog volume (their metric)	3 calls/30d

listed products (catalog path · advertised price · live price we measured)

/api/assess/rwa	$0.02	$0.02 (matches)
/api/firewall	$0.002	$0.002 (matches)
/api/verify	$0.02	$0.02 (matches)
/api/assess	$0.002	not yet probed
/api/assess/deep	$0.02	not yet probed
/api/compliance	$0.02	not yet probed
/api/policy	$0.002	not yet probed

grade evidence: hourly probes of /api/assess. Availability, latency and protocol measure the operator's shared infrastructure and generalize across its products; the price check applies to the probed product. We now also probe one other product per hour, rotating; "live price we measured" shows what each answered.

event log (from our catalog snapshots and probes)

20260806 10:34

payment receiver changed to 0x1A9F…6dE5, 4uLqY8…B5jB

Seller description of the probed product (one of 7 listed) · unverified · not part of the rating

Assess an x402 counterparty before paying. POST {target:{payto_address}, payment_context?, policy?}; payto may be a 0x EVM (Base) or base58 Solana seller. Returns risk_score 0-100, decision allow/review/block, confidence, coverage, per-dimension signals, …

receiver-changed

Embed this grade (free, always current)

<a href="https://x402register.com/s/402sentinel.com.html"><img src="https://x402register.com/badge/402sentinel.com.svg" alt="x402 register grade B"></a>

What this grade does and doesn't measure: it scores the paid-request handshake — whether the service returns a spec-valid 402 payment challenge, how fast, and whether its price is honest. We do not pay these endpoints yet, so we do not verify that the paid response returns correct or complete content. Availability is a probe success rate measured hourly, from a single network vantage for this service.

Operator of 402sentinel.com? Dispute this rating. Scores are opinions based on automated measurements at the stated times.