402signal.com

86.3 / 100 · rank 1503 of 1618

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

Latency97

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
Median 402 handshake	278ms
p90 handshake	591ms
Catalog price (advertised)	$0.01
Live price (median demanded)	$0.01
Price status	match
Protocol	x402 v2
Category (our classification)	agent-tools
Payment receiver	0xb18f…7d16 (+1 more) · stable since Jul 12
Base USDC settlement to this receiver wallet (30d' measured by us)	x402-plausible (amount matches a listed price): $0 · 36 transfers · 3 distinct senders. All USDC inflow' upper bound incl. non-x402: $0 · 36 transfers.
Second vantage	confirmed 402 from a second network path (Cloudflare edge), just now
Discovery (.well-known/x402)	present
Catalog volume (their metric)	38 calls/30d

Seller-provided description · unverified · not part of the rating

402Signal is the independent check an AI agent makes right before spending. It finds the strongest x402 route across Base, Solana, and Algorand, verifies it live, and shows the evidence behind the choice. Your agent keeps the wallet. The decision history …

Embed this grade (free, always current)

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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, corroborated by a second network path for this service.

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