the402 endpoint detail

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sms-validator.api.klymax402.com api validate

https://sms-validator.api.klymax402.com/api/validate

payable

Validate if a phone number can receive SMS

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
0x6E8B64638b24C6D625b045dD353120d850064E2E
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
674 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:15:55.419Z (4d ago)
Category
other

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fsms-validator.api.klymax402.com%2Fapi%2Fvalidate"