A
x402.greenhead.io
90.4 / 100 · rank 1558 of 1920
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
Availability83
Latency86
Price integrity100
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 61 probes · single vantage |
| Median 402 handshake | 406ms |
| p90 handshake | 517ms |
| Catalog price (advertised) | $0.002 |
| Live price (median demanded) | $0.002 |
| Price status | match |
| Protocol | x402 v2 |
| Category (our classification) | finance-crypto |
| Payment receiver | 0x6bF8…1d1a (+1 more) · stable since Jul 12 |
| On-chain settlement | ⚠ settles on another chain; we index Base and Solana only, so settlement is not corroborated for this service |
| Discovery (.well-known/x402) | present |
| Catalog volume (their metric) | 2 calls/30d |
Seller-provided description · unverified · not part of the rating
Prove route for Base mainnet USDC x402 (eip155:8453). HTTP 200 after facilitator verify+settle. Priced as the cheapest SKU (0.002 face → 2000 USDC atomic when Base is enabled).
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, from a single network vantage for this service.
Operator of x402.greenhead.io? Dispute this rating. Scores are opinions based on automated measurements at the stated times.