BounceZero is a real-time email verification API that helps marketers, developers, and sales teams eliminate bounces before they damage sender reputation. Our 5-stage pipeline runs 40+ signals per address: MX record validation, real-time SMTP probing, disposable and role-based address detection, catch-all domain identification, and an AI-powered scoring engine that returns a confidence score from 0–100. Use cases: • Clean marketing lists before campaigns (bulk upload, CSV) • Block bad emails at signup in real time (REST API, <300ms) • Enrich CRM data with deliverability scores • Reduce bounce rates below 0.5% to protect ESP accounts BounceZero starts free — 100 credits/month, no card required. Paid plans from $9/month. Enterprise API available with SLA and dedicated IPs.