MailValid

mailvalid.io is an email verification API built for developers and marketing teams who need accurate, fast, and affordable email validation — without subscriptions, expiring credits, or features bundled into the price that you never asked for. ── WHAT IT DOES ── Every verification runs through multiple layers of checks: - Syntax validation - RFC 5322 compliant format check catches typos and malformed addresses instantly - Domain & MX check - confirms the domain exists and has valid mail exchange records configured - SMTP mailbox verification - connects to the mail server to confirm the mailbox exists without sending an actual email - Disposable email detection - identifies throwaway addresses from Mailinator, 10MinuteMail, Guerrilla Mail, and thousands of other temporary providers - Catch-all domain detection - flags domains configured to accept all emails regardless of whether the specific mailbox exists - Role-based address detection - identifies addresses like info@, support@, admin@ that harm engagement rates - Free provider detection - flags Gmail, Yahoo, Outlook, and other free email providers Every response includes 10+ data points so you have the full context to make the right decision for your use case. ── THREE WAYS TO VERIFY ── REST API (real-time) - Average response time under 500ms. A single API call returns a structured JSON result with validity status, reason codes, and detailed flags. Integrate into signup forms, checkout flows, or lead capture in minutes. Bulk upload - Upload a CSV and receive a clean, segmented results file. Processes up to 10,000 emails per batch. Download with full status breakdown: valid, invalid, catch-all, disposable, role-based, unknown. Single check - Paste any email address into the live checker for an instant result. Free to use, no signup required. ── WORKS WITH ANY PLATFORM ── mailvalid.io is a REST API - if your platform can make an HTTP request, it works. That covers every major framework, CMS, no-code tool, and automation platform. Native code examples for Python, Node.js, PHP, Java, Ruby, and Go. One endpoint, clean JSON in and out. Whether you're on Laravel, Django, Rails, Next.js, WordPress, Webflow, Bubble, Zapier, or Make — if it can send a POST request, it integrates with mailvalid.io. ── USE CASES ── SaaS signup verification - Block fake accounts and disposable emails at registration. Keep your user database clean from day one. Email list cleaning - Clean marketing lists before campaigns. Remove invalid, disposable, and risky emails to protect sender reputation and reduce bounce rates. E-commerce checkout - Validate customer emails during purchase so order confirmations and shipping updates actually reach buyers. CRM data hygiene - Identify stale and invalid contacts. Keep your CRM accurate and your outreach focused on real prospects. Lead generation - Verify leads in real-time as they come in. Filter out fake submissions before they enter your pipeline. Cold email - Verify prospect lists from Apollo, Hunter, and LinkedIn Sales Navigator before sending. Protect your sending domain from bounce spikes and blacklisting. ── PRICING ── $0.001 per email. No monthly subscription. No expiring credits. At 100,000 emails, mailvalid.io costs $100. ZeroBounce costs $390. Same 95%+ accuracy. One credit = one completed verification (valid, invalid, catch-all, or do-not-mail). Duplicate emails in the same bulk upload, recently verified repeats, and inconclusive checks don't cost a credit. Credits stay in your account until you use them. ── WHY TEAMS CHOOSE MAILVALID ── → $0.001/email — 6x cheaper than ZeroBounce, 8x cheaper than NeverBounce → Credits never expire - buy once, use at your own pace → Under 500ms average API response time → 10+ data points per verification → 95%+ accuracy across syntax, DNS, MX, and SMTP checks → 99.9% uptime SLA → Works with any platform or language via REST API → 100 free credits on signup - no credit card required → 10M+ emails verified