Detect disposable emails and MX signals.
Screen email addresses against 5,000+ burner domains, check MX presence, and evaluate signup fraud risk in real-time.
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Run a real check.
The response will appear here with timestamps, evidence, and honest boundaries.
What this does not prove
Domain and MX checks confirm provider legitimacy, not mailbox existence or inbox delivery.
Built for integration
Use the result in code.
The public tool is intentionally rate limited. A LookTwice workspace adds API keys, idempotency, usage history, higher limits, and the documented production endpoint.