MailboxValidator
FreemiumLiveLast verified 24 Sept 2026
Checks if an email address is deliverable, disposable, or from a free provider like Gmail.
Example request
curl -s 'https://api.mailboxvalidator.com/v2/email/free?key=$API_KEY&email=user@example.com&format=json'
Free tier, in plain English
A free API-FREE plan gives 300 email checks a month, renewing automatically at no cost; paid plans start at 3,000/month.
Alternatives in Email Validation
Abstract Email Validation APIChecks whether an email address is real and deliverable via syntax, MX, and SMTP checks.FreemiumApexVerifyPay-as-you-go API that verifies email addresses and phone numbers in real time.Free trialCloudmersive ValidateValidates email deliverability, phone numbers, EU VAT IDs, addresses and domains in one family.FreemiumDisifyChecks email syntax, DNS/MX records, and flags disposable or temporary email addresses.FreemiumEmailvalidationChecks an email's syntax, MX records, deliverability and disposable/free-domain status.Freemium