Agent Email Check — pay-per-call email verification over x402

https://mailcheck.netzhandwerker.de

● healthy utility

Address in, verdict and confidence out. Pay per call in USDC over x402. No signup, no API key. Never claims a mailbox exists without evidence.

Quality grade

How grading works

B+ 85.3 / 100

Availability 40.0 / 40

Endpoint responded (HTTP 200)

Payability 20.0 / 20

✓ Answers a real HTTP 402 challenge
✓ Publishes a /.well-known/x402 descriptor
✓ Payment address on record
✓ Settlement network declared
✓ Price declared

Demand 25.3 / 40

30 distinct payers, 4075 USDC transfers in the last 30 days

Owner verified 0.0 / 3

Nobody has claimed this listing yet

Endpoint last checked 2 h ago. On-chain activity last read 29 h ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

Paid endpoints

2 resource(s) advertised by this origin.

https://mailcheck.netzhandwerker.de/email

https://mailcheck.netzhandwerker.de/email/batch

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -X POST https://mailcheck.netzhandwerker.de

/.well-known/x402.json

https://mailcheck.netzhandwerker.de/.well-known/x402

Listed in

Directories this entry was found in.

cdp-bazaar x402scan