the402 endpoint detail

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x402.agentutility.ai email-verify-api

https://x402.agentutility.ai/email-verify-api

payable

Verifies an email address with syntax, MX, disposable-domain, role-account, SPF, DMARC, and DKIM checks. Same DNS-safe email deliverability backend as email-verify, indexed for agents searching exact email verification wording. Use it as an email verify API or to validate email address input.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.005
Network
base
Pay to
0x6c0752c09e7F6fA6526fCDf40e456a159ebB5621
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
8 ms
Payment options
2 usable of 2
Last checked
2026-08-10T09:12:26.520Z (4d ago)
Category
search

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402.agentutility.ai%2Femail-verify-api"