X402/REGISTERas of 07-21 10:47 UTC

nft-alpha-x402.fly.dev

81.2 / 100 · rank 1360 of 1511

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

Availability93

Latency92

Price integrity27

Protocol100

Consistency100

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)	100.0% of 160 probes
Median 402 handshake	324ms
p90 handshake	416ms
Catalog price (advertised)	$0.1
Live price (median demanded)	$0.02
Price status	match
Protocol	x402 v2
Category (our classification)	finance-crypto
Payment receiver	0x9b8a…f72f · stable since Jul 12
Base USDC inflow to this receiver wallet (30d, all sources — not just x402)	shared receiver wallet — total inflow is not attributable to this domain alone
Second vantage	confirmed 402 from a second network path (Cloudflare edge), 5h ago
Discovery (.well-known/x402)	present
Catalog volume (their metric)	7 calls/30d

event log (from our catalog snapshots and probes)

2026-07-18 01:12	price changed $0.1 → $0.02
2026-07-15 23:16	price changed $0.05 → $0.1

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

NFT Alpha: OpenSea NFT market signals for an OpenSea collection slug. Body: { collection: string, collections?: string[] }. Returns listing/sale/bid counts, price stats, sell-through, and signals such as HIGH_DEMAND, UNDERPRICED_LISTING, BID_FRENZY, …

Embed this grade (free, always current)

<a href="https://x402register.com/s/nft-alpha-x402.fly.dev.html"><img src="https://x402register.com/badge/nft-alpha-x402.fly.dev.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, corroborated by a second network path for this service.

Operator of nft-alpha-x402.fly.dev? Dispute this rating. Scores are opinions based on automated measurements at the stated times.