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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 2026-09-14).
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
Deterministic, dependency-free data utilities served over x402 micropayments (USDC on Base). None of these call another AI model. Keyword: JSON repair Keyword: malformed JSON Keyword: broken JSON from LLM Keyword: fix JSON output Keyword: JSON sanitizer Keyword: truncated JSON recovery Keyword: YAML to JSON Keyword: convert YAML Keyword: parse YAML config Keyword: cron next run Keyword: cron parser Keyword: when does cron run next Keyword: unified diff Keyword: line diff Keyword: text diff Keyword: HTML to text Keyword: extract links Keyword: extract emails Keyword: scrape text Keyword: whois lookup Keyword: domain registration Keyword: registrar Keyword: domain expiry date Keyword: RDAP Keyword: dns lookup Keyword: MX records Keyword: TXT records Keyword: A record Keyword: DNS over HTTPS Keyword: github repo stats Keyword: github stars Keyword: repository popularity Keyword: OSS project metadata Keyword: email validation Keyword: verify email address Keyword: check MX deliverability Keyword: email syntax Use case: repair a JSON code block wrapped in Markdown fences Use case: turn a docker-compose or CI YAML file into JSON Use case: compute the next UTC fire time of a cron expression Use case: produce a unified diff between two versions of a file Use case: strip HTML tags and pull out links, emails, and headings Use case: look up a domain's registrar, status and expiry before purchase Use case: check when a domain registration lapses Use case: resolve A, AAAA, MX, TXT or NS records for a hostname Use case: find a domain's mail servers and SPF TXT record Use case: compare GitHub repository stars, forks and activity for market research Use case: check whether an email address is well-formed and its domain accepts mail
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/validateWhen 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 |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"mx": [
{
"host": "",
"preference": 0
}
],
"ok": true,
"email": "hello@example.com",
"valid": true,
"status": "NOERROR",
"domainHasMx": true,
"formatValid": true
}
}Tags
x402
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