the402 endpoint detail

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api.aventtech.com validate email

https://api.aventtech.com/validate/email

payable

Validate an email address and check whether an email domain can receive mail. Verifies email syntax and performs a live MX and A DNS lookup to return a deliverability verdict, the mail servers (MX hosts) and whether the domain accepts email. Fast email address validation and verification for signup forms, lead lists and contact data cleaning.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.003
Network
base
Pay to
0x5100a134d768415cc4a25d7bdbcfc44394d62282
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
205 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:12:22.354Z (1d ago)
Category
search

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.aventtech.com%2Fvalidate%2Femail"