$ curl -s -X POST https://vrfy.lol/ \ -H "Content-Type: application/json" \ -d '{"email":"user@example.com"}' | jq .action

POST-only No SMTP No tracking PoW anti-abuse Open source $0 forever

RFC 5321 Syntax

Full spec compliance including EAI, IP literals, quoted local parts.

MX & DNS

MX records, null MX detection, A/AAAA fallback, domain existence.

Disposable Detection

141K+ disposable domains bundled, with exact and parent-domain matching.

Privacy Relays

Apple HME, SimpleLogin, Addy.io, Firefox Relay, DuckDuckGo — classified separately.

Typo Correction

Levenshtein + curated map. Suggestions verified against live MX.

Provider ID

Google, Microsoft, Proton, Fastmail, and 20+ providers from MX patterns.