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Resolve402 Email Verification
x402
Resolve402 Email Verification is a paid API for AI agents from resolve402.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-11).
Validates an email address by checking syntax, MX records, mail provider identity, and flags disposable, free webmail, and role-account addresses.
Price / call$0.003
Success—
StatusUnknown
How this service works
Email pre-check: syntax, MX records, mail provider (Google, Microsoft 365, OVH...), disposable, free webmail and role-account flags.
Output
Returns a structured response indicating: whether the email passes syntax validation, whether MX records exist for the domain, the identified mail provider (e.g. Google, Microsoft 365, OVH), and boolean flags for disposable address, free webmail account, and role-based account (e.g. info@, support@).
Example use cases
Block disposable emails at signup
“Before we activate this new user account, check whether the email they gave us — tempuser123@mailnator.com — is a disposable or throwaway address so we can decide whether to block the registration.”
Qualify B2B lead email quality
“I have a lead who submitted contact@acmecorp.com — can you verify that email is real, find out if it's hosted on Google Workspace or Microsoft 365, and flag whether it's a generic role account rather than a personal one?”
Pre-validate newsletter subscriber list
“Before we import subscribers, check if the address newsletters@yahoo.com is a free webmail account, whether MX records exist for that domain, and if there are any red flags we should know about.”
Technical details
Endpoint
GEThttps://resolve402.dev/api/verify-email?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pre-send email pre-check that combines syntax validation, DNS/MX lookup, provider identification, and abuse-signal flags (disposable, webmail, role account) in a single call. Prefer it over full SMTP verification when you want fast, non-intrusive validation without sending a probe message. It is especially well-suited for signup fraud prevention, lead scoring, and list hygiene workflows where provider identity matters.
Side effects
- Invalid or missing email query parameter returns an error
- Domains with no public MX records may return inconclusive DNS results
- Newly created disposable email domains may not yet be flagged
- Rate limiting or payment failure (x402) if USDC balance is insufficient
- Temporary DNS resolution failures may cause false negatives on MX checks
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"email": "jane@acme.fr",
"has_mx": true,
"deliverable": "likely",
"syntax_valid": true,
"mail_provider": "google_workspace"
}
}Tags
x402
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