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Penniless Data Utilities – Email Validation
x402
Penniless Data Utilities – Email Validation is a paid API for AI agents from penniless-json-repair.sjaman.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).
Validates an email address by checking format syntax and performing a live DNS MX record lookup to confirm the domain can receive mail
Price / call$0.001
Success—
StatusUnknown
How this service works
Paste malformed JSON from ChatGPT, Claude or any model and get it repaired in your browser. Fixes code fences, trailing commas, single quotes, unquoted keys, Python True/False/None, comments and truncated output — and names every repair it made. Free, no signup, nothing uploaded.
Output
Returns a JSON object containing: the normalized email address, a boolean 'valid' overall result, 'formatValid' indicating syntax correctness, 'domainHasMx' indicating whether MX records exist, 'ok' for request success, the raw DNS 'status' (e.g. NOERROR), and an array of 'mx' records with host and preference values.
Example use cases
Pre-send email list scrubbing
“Before I send out this campaign, check if contact@acmecorp.com is actually deliverable — valid format and an MX record on the domain?”
User signup email verification
“A new user just signed up with the email jsmith@bigco.net — can you confirm it's properly formatted and that bigco.net can actually receive email?”
CRM data quality audit
“I've got an email address in my CRM — info@outdatedbrand.io — can you tell me if it's syntactically valid and whether that domain has working mail servers?”
Technical details
Endpoint
POSThttps://penniless-json-repair.sjaman.workers.dev/email/validate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need lightweight, deterministic email validation that combines format checking with live DNS MX record verification, without relying on sending a confirmation email or calling an AI model. Ideal for pre-send list hygiene, signup form validation, or CRM auditing where you want a fast, cheap ($0.001 USDC) programmatic check. Prefer this over heavier deliverability services when you only need format + MX-level assurance rather than SMTP-level probing or inbox existence verification.
Side effects
- Malformed or missing email input parameter returns an error response
- Domain with no DNS record returns domainHasMx: false and valid: false
- Temporary DNS resolution failure may return an error status rather than NOERROR
- Email with valid format but unresolvable TLD returns domainHasMx: false
- Payment failure via x402 micropayment results in 402 response before validation occurs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| emailrequired | string | Email address |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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