{
  "service": "Email Verifier API",
  "what": "Verify deliverability without sending anything. RFC 7505 null-MX, RFC 5321 implicit-MX, typosquat, disposable and role detection.",
  "endpoints": {
    "GET /verify?email=a@b.com": "verify one address",
    "POST /verify {\"emails\":[\"a@b.com\"]}": "verify up to 100 addresses",
    "GET /health": "liveness"
  },
  "statuses": {
    "valid": "domain accepts mail, address looks like a person",
    "risky": "deliverable but flagged — role, disposable, or a likely typosquat",
    "invalid": "will bounce — bad syntax, null MX, or no mail route",
    "unknown": "DNS failed transiently; NOT a bad address. Re-check. Never billable."
  }
}