Email Validation API

api.kadec0.xyz · x402

Email validation and email list cleaning. Checks each email address for RFC syntax, a live MX record lookup returning the real mail hosts, disposable-domain detection, role-account flags (info@, sales@, noreply@), and a free-provider flag, rolled into a per-address ok/risky/invalid verdict with reasons. Batch up to 25 email addresses per call. Domain-level DNS only, no SMTP mailbox probe. Keyless.

Name and description as published by x402 Bazaar

Live

Last successful check: 25 Oct 2026, 18:29 UTC.

answered, last 24 hours: 100%
answered, last 30 days: 100%

How addrbook checks →

Connect

https://api.kadec0.xyz/v1/email-validate

x402: an unpaid request gets a 402 with the price and pay-to wallet. addrbook never pays.

Who's behind it

Listed by: x402 Bazaarlast seen 25 Oct, 19:50 UTC
Wallets named: 0x4df66b6c140778fe0717880a7c6dde5ea53acdeanamed by x402 Bazaar
Listed since: 25 Oct 2026, 17:50 UTC

Checks by endpoint

Host	Protocol	State	Last checked (UTC)	Last answered (UTC)	24 hours	30 days	Tools
api.kadec0.xyz	x402	Live	25 Oct, 18:29	25 Oct, 18:29	100%	100%	—

Also listed as

Other entries that share an endpoint with this one.

api.kadec0.xyz