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Foundry Email Validator
x402
Foundry Email Validator is a paid API for AI agents from minty-sprout.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-03).
Validates an email address by checking syntax, MX records, disposable domain status, and role account flags to estimate deliverability.
Price / call$0.001
Success—
StatusUnknown
How this service works
Email validation: syntax, MX records, disposable domain and role account checks. Input: an email address.
Output
Returns a JSON object containing the parsed domain, a list of MX records, boolean flags for has_mx, valid_syntax, disposable, and role_account, plus a deliverable_guess boolean summarizing overall deliverability likelihood.
Example use cases
Sign-up form email screening
“Before we store this new user registration, check whether the email they entered — temp9821@mailinator.com — is disposable, a role account, or just has invalid syntax so we can reject bad signups early.”
Cold outreach list hygiene
“I've got this lead email address contact@acme.io — can you verify it has valid syntax and working MX records so I know it's worth including in my outreach campaign?”
Detecting fake accounts
“A user just signed up with admin@protonmail.com — is that a role account or a known disposable domain? I want to flag it before approving their account.”
Technical details
Endpoint
POSThttps://minty-sprout.onrender.com/v1/email-validate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, inexpensive multi-factor email check — syntax plus DNS MX lookup plus disposable and role-account detection — in a single call, especially during user onboarding, lead list cleaning, or fraud prevention flows where you need more than just regex validation but don't need full SMTP handshake verification.
Side effects
- Missing or empty input email returns a validation error
- Malformed JSON body returns a 400 error
- Network timeout reaching MX DNS servers may produce incomplete results
- Very new domains may have MX records not yet propagated, causing false negatives on has_mx
- Service may be temporarily unavailable on the Render free tier with cold start delays
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | An email address |
Output
Schema · Response
{
"type": "json",
"example": {
"mx": [
"gmail-smtp-in.l.google.com"
],
"email": "someone@gmail.com",
"domain": "gmail.com",
"has_mx": true,
"disposable": false,
"role_account": false,
"valid_syntax": true,
"deliverable_guess": true
}
}Tags
x402
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