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Email Validation & Verification API
x402
Email Validation & Verification API is a paid API for AI agents from companyfacts.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).
Validates an email address by checking mail server existence, disposable address status, and whether it is a role account
Price / call$0.001
Success—
StatusUnknown
How this service works
Open job postings read first-hand from the applicant-tracking system behind a company's careers page: Greenhouse, Ashby, Lever or Workable. Includes a directory of 8532 company job boards, because none of the vendors publishes one. Salaries are parsed into numbers where the employer publishes them and refused where ambiguous. No personal data.
Output
Returns a JSON object with the submitted email address, a verdict string (e.g. 'mail_server_found'), a boolean indicating whether the address is from a disposable provider, and a boolean indicating whether it is a role account (e.g. info@, support@, admin@).
Example use cases
Sign-up form spam filtering
“Before we store this new user registration, check if the email they gave us — dropbox123@mailnull.com — is a disposable or fake address so we can reject it at the door.”
CRM lead quality scoring
“I'm importing a list of leads and want to validate whether the email address john.doe@acmecorp.com has a real mail server and isn't a role account before I add it to our outreach sequence.”
Newsletter list hygiene
“Can you run a check on support@bigcompany.org to see if it's a role-based email address? I don't want to send our newsletter to generic inboxes that nobody reads.”
Technical details
Endpoint
GEThttps://companyfacts.dev/x402/v1/email-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time, lightweight email hygiene checks — specifically to detect disposable addresses and role accounts — without storing any personal data. It is best suited for pre-submission validation in sign-up flows, lead qualification pipelines, or mailing list imports where bounce reduction and spam prevention matter. Prefer it over full email deliverability services when you need a fast, low-cost per-query signal rather than bulk list scrubbing.
Side effects
- Missing or malformed email query parameter returns an error
- Unresolvable or non-existent domain may return a verdict indicating no mail server found
- Ambiguous or partial email strings may fail schema validation
- Network timeouts contacting upstream DNS/MX record lookups could delay or fail response
- Rate limits may apply if many checks are issued in rapid succession
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"email": "jane@example.com",
"verdict": "mail_server_found",
"disposable": false,
"role_account": false
}
}Tags
x402
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