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x402-farm Email Validator
x402
x402-farm Email Validator is a paid API for AI agents from x402-farm.vercel.app, paid per call via x402, $0.005/call, status down (last checked 2026-09-15).
Validates an email address by checking syntax correctness and domain MX record existence, without sending any email.
Price / call$0.005
Success—
StatusDown
How this service works
Pay-per-call APIs for AI agents — x402 protocol, USDC on Base, no account needed.
Output
Returns a validation result indicating whether the email address passes syntax checks and whether the domain has valid MX records configured, without ever sending an email or contacting the recipient.
Example use cases
Pre-send email verification in a form
“Before I add this email to my mailing list, can you verify that hello@myclient.io is properly formatted and that the domain has working mail servers?”
Cleaning a user-submitted contact list
“I have a new lead that filled in 'contact@startup-xyz.co' on our form — can you quickly validate whether that email address looks real and the domain can receive emails?”
Catching typos in signup flows
“A user just entered 'jane@gmial.com' during signup — can you check if this email address is syntactically valid and whether the domain actually has MX records configured?”
Technical details
Endpoint
GEThttps://x402-farm.vercel.app/v1/email/validateWhen to prefer
Choose this endpoint when you need lightweight, no-side-effect email validation that checks both syntax and domain-level deliverability (MX records) without sending a probe email. Ideal for form validation, lead enrichment, or list cleaning where you want a fast, cheap per-call check ($0.005 USDC) with no account setup required. Prefer over full deliverability services when you don't need SMTP-level verification or inbox existence checks.
Side effects
- Missing or empty email query parameter returns an error
- Malformed query string (e.g. missing '?email=') may cause a bad request
- MX lookup may time out for slow or unresponsive DNS servers
- Payment not included or invalid returns HTTP 402 requiring USDC payment on Base
- Disposable or newly registered domains may have inconsistent MX records affecting result accuracy
Output
Schema · Response
{
"type": "json",
"example": {
"mx": "gmail-smtp-in.l.google.com",
"email": "test@gmail.com",
"valid": true
}
}Tags
x402
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