One call email risk check: everything in email_check plus sender domain health (domain age, registrar, SPF, DMARC, website reachable) and a 0-100 risk score with accept/review/reject verdict. Use for fraud screening, lead qualification and signup gating. Price $0.0025 USDC per call via x402. Example output: {"email":"jane@acme.com","has_mail_server":true,"disposable":false,"domain_health":{"registrar":"GoDaddy.com, LLC","age_days":4021,"spf":"v=spf1 include:_spf.google.com ~all","dmarc":"v=DMARC1; p=reject","website_reachable":true},"risk_score":0,"risk_reasons":[],"verdict":"accept"}