| Availability (valid 402 returned) | 100.0% of 61 probes · single vantage |
| Median 402 handshake | 715ms |
| p90 handshake | 842ms |
| Catalog price (advertised) | $0.005 |
| Live price (median demanded) | $0.005 |
| Price status | match |
| Protocol | x402 v2 |
| Category (our classification) | content-media |
| Payment receiver | 0x3be2…c35e · stable since Jul 12 |
| Base USDC inflow to this receiver wallet (30d, all sources — not just x402) | none observed |
| Discovery (.well-known/x402) | not found |
| Catalog volume (their metric) | 1 calls/30d |
Validate an email address before your agent spends money enriching, contacting, or storing the lead. RFC-shaped syntax check plus live domain DNS resolution in under 2 seconds. Does not confirm mailbox existence -- honest about what a sub-second, …
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.
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