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api.kadec0.xyz v1 email-validate
https://api.kadec0.xyz/v1/email-validate
answers 402
Email validation for lead lists and signup forms: RFC syntax check, live MX record lookup with the actual mail hosts, disposable-domain detection (8k+ known throwaway domains), role-account flag (info@, sales@, noreply@), and free-provider flag, rolled into a per-address ok/risky/invalid verdict with reasons. Batch up to 25 addresses per call. Domain-level DNS checks only, no SMTP mailbox probe. K
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.03
- Network
- base
- Pay to
- 0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 229 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:12:30.538Z (2h ago)
- Category
- search
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.kadec0.xyz%2Fv1%2Femail-validate"