| Availability (valid 402 returned) | 100.0% of 62 probes · single vantage |
| Median 402 handshake | 356ms |
| p90 handshake | 547ms |
| Catalog price (advertised) | $0.005 |
| Live price (median demanded) | $0.005 |
| Price status | match |
| Protocol | x402 v2 |
| Category (our classification) | agent-tools |
| Payment receiver | 0x4DA1…8d7F · 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 |
| Discovery (.well-known/x402) | present |
| Catalog volume (their metric) | 1 calls/30d |
| /v1/drift | $0.005 | not yet probed |
| /v1/lido/exit-risk | $0.005 | not yet probed |
| /v1/passport-sanctions/address | $0.02 | not yet probed |
| /v1/passport/address | $0.02 | not yet probed |
| /v1/payment-check | $0.005 | not yet probed |
| /v1/recipient/address | $0.005 | not yet probed |
| /v1/risk/address | $0.005 | not yet probed |
| /v1/sanctions/address | $0.005 | not yet probed |
| /v1/sanctions/batch | $0.1 | not yet probed |
| /v1/simulate | $0.01 | not yet probed |
and 2 more listed paths
grade evidence: hourly probes of /v1/drift. Availability, latency and protocol measure the operator's shared infrastructure and generalize across its products; the price check applies to the probed product. We are beginning to probe secondary products, rotating one per hour.
Pre-sign check: agents call Meridian before they sign. MioDio Meridian parameter-drift check: diffs a declared intent against the exact unsigned tx or EIP-712 payload (~$0.005 USDC Exact on Base). Verdict match, drift or cannot_verify. Unknown calldata is …
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 meridian.miodiollc.com? Dispute this rating. Scores are opinions based on automated measurements at the stated times.