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AgentKit x402 Email Check
x402
AgentKit x402 Email Check is a paid API for AI agents from agentkit-x402.erikssonanton2001.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-17).
Validates an email address by checking syntax, DNS/MX records, disposability, role-account status, and typo detection — without SMTP connection — returning a scored verdict.
Price / call$0.002
Success—
StatusUnknown
How this service works
Email checks, DNS and email-authentication audits, website contact extraction, SEO audits, URL to Markdown and Swedish validators, paid per call in USDC with x402.
Output
Returns a JSON object with: the input email, local part, domain, syntax validity flag, DNS MX records, null MX and NXDOMAIN flags, address record presence, disposable flag, role account flag, free provider flag, SMTP-checked flag, a 0–100 score, a verdict string (e.g. 'risky', 'valid', 'invalid'), a list of reason codes (e.g. 'possible_domain_typo'), and an optional typo suggestion string. No SMTP connection is made, so mailbox existence is not confirmed.
Example use cases
Pre-signup email quality gate
“Before I add this user to our mailing list, check if john.doe@yoopmail.com is a real, non-disposable email with a valid MX record — give me a verdict and score.”
Catch typos in lead capture forms
“A lead just submitted contact@gmaill.com on our form — can you run an email check on it and tell me if there's a likely typo correction I should suggest to them?”
Flag risky emails before CRM import
“I'm about to import a CSV of 1 email at a time — start with support@mailinator.com and tell me if it's risky, disposable, or a role account so I can decide whether to include it.”
Technical details
Endpoint
GEThttps://agentkit-x402.erikssonanton2001.workers.dev/v1/email-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, no-SMTP email quality check that covers syntax, DNS MX lookup, disposable/role-account detection, and typo suggestions in a single call — especially useful for pre-validating user-submitted emails before sending campaigns or storing in a CRM. Prefer over full SMTP-based validators when speed matters and you don't need confirmed mailbox existence.
Side effects
- Missing required 'email' query parameter returns an error
- Malformed email string may still return a result with syntax_valid=false
- DNS lookup failures for obscure domains may produce incomplete MX data
- Payment failure (x402 USDC) blocks the request before processing
- Non-existent TLDs may return nxdomain=true with limited detail
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"dns": {
"mx": [
{
"host": "mail.gmial.com",
"priority": 10
}
],
"null_mx": false,
"nxdomain": false,
"address_record": true
},
"note": "Based on syntax, lists and DNS only. No SMTP connection is made, so a deliverable mailbox is not confirmed.",
"email": "anna@gmial.com",
"score": 70,
"domain": "gmial.com",
"reasons": [
"possible_domain_typo"
],
"verdict": "risky",
"disposable": false,
"local_part": "anna",
"role_account": false,
"smtp_checked": false,
"syntax_valid": true,
"free_provider": false,
"typo_suggestion": "gmail.com"
}
}Tags
x402
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