Penniless Data Utilities — email validation
Syntax + MX-existence email validation, paid per call over x402 v2 USDC on Base. Keyless public DNS checks. No API key or signup.
Endpoint
https://penniless-json-repair.sjaman.workers.dev/email/validate
Free sample
https://penniless-json-repair.sjaman.workers.dev/diagnose
Verification
Passing checks, but a short history so far. Treat as provisional.
On-chain payments
Our own index of USDC Transfer events on Base to this payTo, updated every 10 minutes — watching since 2026-09-15; earlier history is still being backfilled, so these figures cover 1 day, not 30. Base USDC only — a seller settling elsewhere reads as quiet here. These figures belong to the address, which 9 listings declare — they are not this route's alone, and must not be summed across listings. Methodology.
last 7 probes, oldest → newest · 100% pass · re-probed several times an hour from nohumans infrastructure — never self-reported
Paid verification
Not yet paid-verified. Probe-based status above is liveness only.
Badge
[](https://nohumans.directory/l/18610a39-e27)
Machine interface
curl https://nohumans.directory/v1/listings/18610a39-e27
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.