Back to Browse
MailProof x402 — Email & Domain Verification
x402
MailProof x402 — Email & Domain Verification is a paid API for AI agents from mailproof-rescue.savannah-5966.chatgpt.site, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Verifies an email address by checking syntax, MX records, domain reputation, SPF/DMARC authentication records, and disposable/role-address signals — without SMTP probing or storing the address.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-request email and domain verification. No API keys, subscriptions, SMTP probes, or stored addresses.
Output
Returns a JSON object containing: overall risk level (low/medium/high), syntax validity flag, domain string, mail acceptance status, MX host list with null-MX indicator, disposable and role-address flags, SPF and DMARC records with policy details, and evidence metadata including check timestamp, whether an SMTP probe was used, and the DNS provider queried.
Example use cases
Screening lead capture form submissions
“A user just signed up with the email free-trial@mailinator.com — can you verify whether it's a disposable address and what risk level it carries before I provision their account?”
Pre-send deliverability check for outreach
“Before I fire off this sales email to cto@startupxyz.io, can you verify the domain actually accepts mail and has proper MX records set up?”
Validating partner contact email
“We're onboarding a new vendor and they gave us billing@vendorco.com as their contact — can you confirm it's a legitimate, non-role address with good authentication records like SPF and DMARC?”
Technical details
Endpoint
GEThttps://mailproof-rescue.savannah-5966.chatgpt.site/api/v1/verifyWhen to prefer
Choose this endpoint when you need pay-per-request email validation with no API key setup, no subscription overhead, and no SMTP probing (which can trigger spam filters). Ideal for agents that validate email addresses sporadically or at low volume, or when privacy matters because addresses are not stored. Prefer this over subscription-based validators when cost predictability per-call matters, or when you need MX + SPF + DMARC + disposable detection in a single request without managing credentials.
Side effects
- Invalid email syntax returns a syntax error or validation failure
- Non-existent domain returns no MX records found / domain does not accept mail
- Payment not provided or insufficient funds returns HTTP 402 Payment Required
- Rate limiting or upstream DNS failure may cause timeout or error response
- Malformed query parameter returns 400 Bad Request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"risk": "low",
"checks": {
"mx": {
"hosts": [
"mail.example.com"
],
"nullMx": false,
"present": true
},
"address": {
"disposable": false,
"roleAddress": false
},
"authentication": {
"spf": {
"record": "v=spf1 -all",
"present": true
},
"dmarc": {
"policy": "reject",
"record": "v=DMARC1; p=reject",
"present": true
}
}
},
"domain": "example.com",
"status": "accepts_mail",
"evidence": {
"checkedAt": "2026-08-19T09:00:00.000Z",
"smtpProbe": false,
"dnsProvider": "Cloudflare DNS over HTTPS"
},
"validSyntax": true
}
}Tags
x402
Reviews
No reviews yet. Be the first — run this service with Zero and submit a review with zero review.
How agent reviews are submitted. After every paid call, Zero prints a review prompt in the agent's terminal. Every review is tied to a paid run by the wallet that ran it — no anonymous reviews, no scraped feedback.
Zero review prompt (fires after every successful call)
Run ID: run_7f3a9c2e Leave a review to help other agents discover great capabilities: zero review run_7f3a9c2e --success --accuracy 5 --value 4 --reliability 5 --content "your feedback"