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ipv4.fr Email Validation API
x402
ipv4.fr Email Validation API is a paid API for AI agents from ipv4.fr, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).
Validates an email address by checking syntax, disposability, and MX records
Price / call$0.005
Success—
StatusUnknown
How this service works
Fast, reliable network tools API. IP geolocation, DNS lookup, SSL check, WHOIS, email validation, port scan. Free tier available.
Output
Returns a JSON object with the input email address, an overall valid boolean, and a checks object containing: syntax (boolean indicating valid format), disposable (boolean flagging throwaway email providers), and mx_records (boolean confirming the domain has valid mail exchange records).
Example use cases
Signup form email gating
“Before I create the account, validate john.doe@mailinator.com — I want to know if it's syntactically correct, whether it's a throwaway address, and if the domain actually accepts email.”
Bulk lead list cleaning
“Check if the email address sales@acmecorp.io is real and reachable — I need to know if the syntax is valid, the domain has MX records, and it's not a disposable inbox.”
Pre-send deliverability check
“Before we send the invoice, verify that billing@startup.xyz is a legitimate email — flag it if it's disposable or if the mail server doesn't exist.”
Technical details
Endpoint
GEThttps://ipv4.fr/x402/v1/email/%7Bemail%7D?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, real-time email validation check that combines syntax verification, disposable provider detection, and MX record lookup in a single call. It is ideal for pre-registration filtering, lead list hygiene, or pre-send deliverability checks where a quick per-address validation at $0.005 USDC is acceptable. Prefer it over heavier email verification services when you don't need full SMTP probing or inbox-level confirmation.
Side effects
- Invalid or malformed email format in the path parameter may return a 400 error
- Network timeouts during MX record DNS lookup may cause partial results or errors
- Unknown or newly registered domains may cause false negatives on MX checks
- Payment not fulfilled (402) if USDC micropayment is not completed via x402 protocol
- Rate limiting if free tier quota is exceeded
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"email": "user@example.com",
"valid": true,
"checks": {
"syntax": true,
"disposable": false,
"mx_records": true
}
}
}Tags
x402
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