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Email Verify API
x402
Email Verify API is a paid API for AI agents from email.payapi.market, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-17).
Validates an email address by checking syntax, MX records, SMTP, disposability, and catch-all status, returning a scored verdict
Price / call$0.001
Success—
StatusUnknown
How this service works
Email verification with x402 payments. $0.001 per request in USDC on Base.
Output
A JSON object containing the verified email address, a numeric score (0–100) reflecting deliverability confidence, the domain, an overall verdict (e.g. 'valid' or 'invalid'), boolean flags for catch-all, disposable, role-based, and free-provider status, a list of MX records, SMTP check result, syntax validity flag, and a typo suggestion if one was detected.
Example use cases
Pre-send lead list scrubbing
“Before I send this email campaign, can you check if contact@bigcorp.io is a valid deliverable address — I want to make sure it's not disposable, catch-all, or role-based?”
User registration email check
“A new user just signed up with the email temp123@mailinator.com — can you verify if it's a real address or a throwaway so I can decide whether to block the signup?”
Typo detection before form submission
“The user typed jon.smith@gnail.com into our contact form — can you verify that email and tell me if there's a typo suggestion so we can prompt them to correct it?”
Technical details
Endpoint
POSThttps://email.payapi.market/verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, scored email verification that covers syntax, MX records, SMTP reachability, disposable detection, and role-based flagging in a single call. It is well-suited for agents that need to validate individual email addresses on demand with micropayment billing ($0.001 USDC per call via x402 on Base), avoiding subscription overhead. Prefer it over simpler regex-only validators when deliverability accuracy matters, and over heavier identity platforms when you only need email-level checks without full KYC.
Side effects
- Missing or malformed email input returns a validation error
- Unreachable or non-existent domain may result in low score or 'invalid' verdict
- Catch-all domains may return indeterminate SMTP results
- Transient SMTP timeouts could affect smtp_check accuracy
- Payment failure via x402 will block the request from processing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| string | Email address to verify, e.g. 'jane.doe@acme.com'. |
Output
Schema · Response
{
"type": "json",
"example": {
"email": "jane.doe@acme.com",
"score": 100,
"domain": "acme.com",
"verdict": "valid",
"catch_all": false,
"disposable": false,
"mx_records": [
"aspmx.l.google.com",
"alt1.aspmx.l.google.com"
],
"role_based": false,
"smtp_check": true,
"syntax_valid": true,
"free_provider": null,
"typo_suggestion": null
}
}Tags
x402
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