← nohumans.directory

Mailcheck API

● verified · infra.validation · 0.01 USDC/call · base

Email validation for AI agents: syntax, MX record, disposable-domain (5,000+ known providers), free-provider, role-based, and typo detection combined into one 0-1 confidence score. Full validation via POST /mailcheck/validate; standalone GET checks also available. $0.01 USDC per request on Base.

Endpoint

https://mailcheck.hugen.tokyo/mailcheck/disposable?domain=example.com

Verification

100%reputation score
4178probes total
740ms~latency
10m agolast passed

We paid this endpoint real USDC and confirmed settlement on-chain; the response was inspected.

On-chain payments

885USDC payments, 30d
394distinct paying wallets
$6.48USDC received, 30d
92listings share this payTo
2026-09-05: 38 payments, 19 payers, $0.212026-09-06: 30 payments, 16 payers, $0.162026-09-07: 29 payments, 18 payers, $0.152026-09-08: 50 payments, 35 payers, $0.282026-09-09: 40 payments, 19 payers, $0.262026-09-10: 31 payments, 21 payers, $0.172026-09-11: 17 payments, 16 payers, $0.122026-09-12: 34 payments, 18 payers, $0.282026-09-13: 17 payments, 17 payers, $0.292026-09-14: 22 payments, 11 payers, $0.182026-09-15: 43 payments, 13 payers, $0.502026-09-16: 34 payments, 26 payers, $0.242026-09-17: 29 payments, 22 payers, $0.202026-09-18: 23 payments, 23 payers, $0.122026-09-19: 19 payments, 19 payers, $0.102026-09-20: 19 payments, 18 payers, $0.292026-09-21: 34 payments, 29 payers, $0.212026-09-22: 36 payments, 25 payers, $0.302026-09-23: 21 payments, 17 payers, $0.162026-09-24: 37 payments, 26 payers, $0.262026-09-25: 20 payments, 17 payers, $0.112026-09-26: 26 payments, 26 payers, $0.142026-09-27: 21 payments, 18 payers, $0.142026-09-28: 24 payments, 13 payers, $0.182026-09-29: 56 payments, 13 payers, $0.522026-09-30: 29 payments, 23 payers, $0.202026-10-01: 25 payments, 18 payers, $0.202026-10-02: 21 payments, 18 payers, $0.132026-10-03: 17 payments, 12 payers, $0.092026-10-04: 24 payments, 19 payers, $0.152026-10-05: 19 payments, 12 payers, $0.15

Payment shape (25 most recent sampled): 25 x402-signed (EIP-3009 transferWithAuthorization, the exact scheme's on-chain signature) · 0 plain transfers (a wallet paying the ordinary way) · 0 other calldata (facilitator batch, smart wallet, or unrelated — not classified).

Peak day 2026-09-29: 56 payments. Last indexed day 2026-10-05: 19. Our own index of USDC Transfer events on Base to this payTo, updated every 10 minutes; window is today plus the 30 prior UTC days. Base USDC only — a seller settling elsewhere reads as quiet here. These figures belong to the address, which 92 listings declare — they are not this route's alone, and must not be summed across listings. Methodology.

last 30 probes, oldest → newest · 100% pass · re-probed on its probe tier's interval (next_check_by on the record) from nohumans infrastructure — never self-reported

Paid verification

✓ verified with real payment — 2026-08-16 $0.01 USDC paid on Base · tx ↗ response: valid JSON (no schema declared)

Real USDC was paid to this endpoint and the response inspected — not just a liveness check. One-time verification at the date shown, not continuous.

[![paid-verified](https://nohumans.directory/badge/4177ff48-267/paid.svg)](https://nohumans.directory/l/4177ff48-267)

Badge

verified — nohumans.directory

[![nohumans.directory](https://nohumans.directory/badge/4177ff48-267.svg)](https://nohumans.directory/l/4177ff48-267)

Machine interface

curl https://nohumans.directory/v1/listings/4177ff48-267

Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.