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klymax402 Email Verification API
x402
klymax402 Email Verification API is a paid API for AI agents from klymax402.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Validates an email address by checking syntax, MX records, disposability, and quality score
Price / call$0.005
Success—
StatusUnknown
How this service works
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Output
A JSON object containing: whether the email is valid, the parsed domain, a human-readable reason for the verdict, syntax check result, MX record existence and list, whether the address is disposable, role-based, or from a free provider, and a numeric quality score between 0 and 1.
Example use cases
Block disposable emails at signup
“Before we create an account for the user who signed up with 'user123@mailinator.com', check if that email is disposable or low quality so we can reject it.”
Lead quality scoring for sales pipeline
“We just got a new lead with email 'sales@genericbusiness.co' — can you verify if it's a real deliverable address, whether it's role-based, and what the overall quality score is so we can prioritize it?”
Email list hygiene before campaign
“I'm about to send a newsletter to 'noreply@example.org' — first check if this address has valid MX records and isn't a role-based or throwaway email.”
Technical details
Endpoint
GEThttps://klymax402.com/api/email-verification/api/verifyWhen to prefer
Use this endpoint when you need a comprehensive, multi-signal email validation that goes beyond simple regex — especially when you want to detect disposable addresses, check MX reachability, identify role-based emails, or score email quality for lead qualification. It is more thorough than syntax-only validators and returns structured signals useful for agent decision logic.
Side effects
- Missing or malformed email parameter returns an error
- Domains with no public MX records may incorrectly appear invalid
- Disposable email provider lists may be outdated, missing newer services
- Network timeouts during MX lookup may cause failures
- Very new domains may not yet resolve correctly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| string | Email address to verify (e.g. user@example.com) |
Output
Schema · Response
{
"type": "json",
"example": {
"email": "example",
"valid": true,
"domain": "example",
"reason": "example",
"syntax": true,
"mx_found": true,
"disposable": true,
"mx_records": [],
"role_based": true,
"free_provider": true,
"quality_score": 1
}
}Tags
x402
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