A
seller-b-production.up.railway.app
92.5 / 100 · rank 1356 of 1844
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
Latency100
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 | 231ms |
| p90 handshake | 252ms |
| Catalog price (advertised) | $0.05 |
| Live price (median demanded) | $0.05 |
| Price status | match |
| Protocol | x402 v2 |
| Category (our classification) | other |
| Payment receiver | 0x9e82…c5a8 · changed 1× since Jul 12 |
| On-chain settlement | testnet listing · no mainnet settlement to measure |
| Discovery (.well-known/x402) | not found |
| Catalog volume (their metric) | 15 calls/30d |
event log (from our catalog snapshots and probes)
| 20260905 22:35 | payment receiver changed to 0x9e82…c5a8 |
Seller-provided description · unverified · not part of the rating
mello資本：總經分析、加密市場資訊（Demo；保留 legacy credit report）
receiver-changed
Embed this grade (free, always current)
<a href="https://x402register.com/s/seller-b-production.up.railway.app.html"><img src="https://x402register.com/badge/seller-b-production.up.railway.app.svg" alt="x402 register grade A"></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 seller-b-production.up.railway.app? Dispute this rating. Scores are opinions based on automated measurements at the stated times.