Email Validation API: Syntax, MX, and Disposable Checks in One Call
Form-level regex misses dead domains, burner addresses, and typos. One GET call returns the full picture.
The endpoint combines five checks in a single JSON response: syntax, MX records, disposable-domain detection against a 121,000-domain list, role-account detection, and a typo suggestion.
What one call checks
Syntax validity per RFC rules, live MX-record lookup for the domain, disposable-domain flagging, role-account detection (info@, admin@, support@), and a didYouMean suggestion for common domain typos like gmial.com.
Quick start
curl "https://email-validator109.p.rapidapi.com/[email protected]" \
-H "X-RapidAPI-Key: YOUR_KEY" \
-H "X-RapidAPI-Host: email-validator109.p.rapidapi.com"Reading the response
valid is the combined verdict. isDisposable flags burner domains you probably want to reject at signup. didYouMean is non-null when the domain looks like a typo of a major provider.
{
"email": "[email protected]",
"normalized": "[email protected]",
"valid": true,
"syntaxValid": true,
"local": "jane.doe",
"domain": "gmail.com",
"hasMx": true,
"isDisposable": false,
"isRoleAccount": false,
"didYouMean": null,
"reason": "Valid and deliverable"
}Batch validation
POST /validate-batch accepts up to 100 addresses per call and returns the same fields for each entry. Useful for cleaning an existing mailing list before a send.
Run it in production
Email Validator has a permanent free tier — 1,000 requests a month, no credit card. Paid plans start at $5/month for 100,000 requests.
FAQ
Does it send an email to the address?
No. Validation is DNS-level (syntax, MX, domain reputation). No message is sent and no SMTP mailbox probe is made.
What counts as disposable?
Domains on a maintained list of roughly 121,000 throwaway-email providers are flagged with isDisposable: true.
Can I validate whole lists?
Yes. POST /validate-batch processes up to 100 addresses per request.