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Mat Web & Data Toolkit – Email Check
x402
Mat Web & Data Toolkit – Email Check is a paid API for AI agents from automatom.matt-d59.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).
Validates an email address by checking its syntax, MX records, domain deliverability, and whether it belongs to a free email provider.
Price / call$0.01
Success—
StatusUnknown
How this service works
Fetches a public web page and returns its title, meta description, outbound links and readable plain text as JSON.
Output
Returns a JSON object containing: the original email and extracted domain, a syntax_valid boolean, a has_mx boolean with the full list of MX exchange records and their priorities, fallback A records, a free_provider boolean indicating whether the domain belongs to a common free email provider (e.g. Gmail, Yahoo), and a deliverable_domain boolean.
Example use cases
Lead quality screening before CRM import
“Before I import this list of emails into the CRM, check whether contact@acmecorp.com is a real deliverable address and not from a free provider like Gmail.”
New user signup email verification
“A user just signed up with the email john.doe@startup.io — can you verify it has valid syntax and that the domain actually accepts email before we send the welcome message?”
Sales outreach domain health check
“I'm about to send a cold outreach campaign — can you check if hello@targetcompany.com has working MX records and is likely to be deliverable?”
Technical details
Endpoint
GEThttps://automatom.matt-d59.workers.dev/emailcheck?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, real-time email validation that goes beyond syntax checking — specifically when you need MX record lookups and free-provider detection in a single call. Prefer it over pure regex validation when deliverability certainty matters, such as before sending transactional emails or qualifying leads.
Side effects
- Missing or malformed email query parameter returns an error
- Domains with no public DNS records may return has_mx: false and deliverable_domain: false even if valid
- Rate limiting or upstream DNS timeouts may cause delayed or failed lookups
- Temporary DNS outages for a domain could cause false negatives on deliverability
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"mx": [
{
"exchange": "",
"priority": 0
}
],
"email": "info@example.com",
"domain": "example.com",
"has_mx": true,
"fallback_a": [],
"syntax_valid": true,
"free_provider": false,
"deliverable_domain": true
}
}Tags
x402
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