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2026-08-31

Batch, bulk, domains, monitors, MCP and free tools

Volume endpoints, domain intelligence, list monitoring, a browser endpoint, an MCP server, and the first free tools.

  • POST /v1/email/batch verifies up to 50 addresses in one request.
  • POST /v1/email/bulk queues up to 100,000 addresses, with an HMAC-signed completion webhook, cancellation, and CSV results.
  • GET /v1/email/domain/{domain} answers MX, provider, SPF and DMARC, registration age, and list membership for a whole domain.
  • A per-account suppression list: undeliverable verdicts are remembered, and existing lists can be imported.
  • Scheduled list monitors re-verify a list on a cadence and alert when its deliverability decays.
  • Publishable keys (pk_…) power a browser endpoint locked to allowed origins.
  • An MCP server lets AI agents verify addresses with an existing API key.
  • Four free tools without signup: email checker, MX lookup, SPF and DMARC checker, and disposable domain checker.
  • The documentation became a multi-page area with a getting-started guide, an email verification guide, and the API reference.
  • The product is now Spaw at spaw.co.

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