Email Verification & Validation API
Verify any email instantly
Stop disposable and fake emails at signup. Check deliverability, catch-all domains, disposable providers and risky senders with a single API call.
Or try the free email checker, no signup →$ curl -X POST /email_risk -d '{"email": "john@gmail.com"}'
Simulated demo with sample data, no API call is made. Sign up for live lookups.
Everything you need to score an email
One request returns structured features and a clear risk level you can act on: approve, review, or block.
Deliverability
SMTP-level checks confirm whether a mailbox actually accepts mail, without ever sending an email.
Disposable detection
Catch temporary and burner domains in real time, even brand-new ones no blocklist has seen yet.
Catch-all domains
Flag domains that accept mail for any address, a common cover for fabricated identities.
Alias abuse
Detect Gmail plus and dot tricks used to spin up many accounts from a single inbox.
Domain intelligence
Domain age, registrar, web and mail infrastructure, and reputation, folded into one risk level.
Quality & history
Gibberish prefixes and address history help separate real, lasting customers from throwaways.
One call, a complete verdict
POST an email address and get back deliverability, disposable and catch-all flags, domain intelligence and a risk score, ready to drop into your signup logic.
curl -X POST https://api.riskunified.com/email_risk \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"email": "signup@tempmail-vault.io"}'{
"status": "complete",
"email": "signup@tempmail-vault.io",
"email_features": {
"email_deliverable": false,
"catch_all": true,
"gibberish_prefix": true,
"email_history_count": 0
},
"domain_features": {
"domain": "tempmail-vault.io",
"domain_risk": "high",
"domain_age_days": 12,
"has_website": false,
"has_mailserver": true
},
"risk": { "level": "high", "signals": ["disposable_domain", "email_not_deliverable"] }
}Frequently asked questions
What does the email verification API check?
Deliverability (whether the mailbox accepts mail), disposable and catch-all domains, alias tricks, gibberish prefixes, address history, and full domain intelligence, all returned as structured features plus a single risk level.
Does verification send an email?
No. Verification checks the mailbox at the mail-server level via SMTP without delivering a message, so the recipient never receives anything.
Is there a free plan?
Yes. Every account includes 100 email verification requests per month with no credit card required.
How fast is it?
Most verifications return in well under a second, fast enough to run inline in a signup or checkout form.
Verify your first 100 emails free
No credit card required. Create an API key and make your first call in under five minutes.