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2026-08-30

Email verification API launch

The first public release of the email verification API, keys, credits, and the dashboard playground.

  • POST /v1/email verifies one address: RFC syntax, live MX resolution, open disposable and role lists, typo suggestions, SPF and DMARC records, and a 0 to 100 risk score built from published weights.
  • An SMTP mailbox handshake runs on every lookup whose domain accepts mail. No message is ever sent.
  • MX provider classification names the infrastructure behind a domain (Google, Microsoft, Proofpoint, and others).
  • Secret API keys (sk_live_…) are created from the dashboard, shown once, and stored hashed.
  • Credits bill answers only: a deliverable or risky verdict costs 1 credit, undeliverable and invalid answers are free, and a repeat within 7 days is free.
  • The dashboard playground runs the same lookups as the API.
  • spaw-form.js, a form helper for the browser, checks addresses on blur, offers a did-you-mean correction, and never blocks a submit.

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