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VerifyPulse Email Verification API
x402
VerifyPulse Email Verification API is a paid API for AI agents from verifypulse-seven.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Validates a single email address for RFC syntax, live MX DNS resolution, disposable domain filtering, and SMTP deliverability in sub-140ms
Price / call$0.01
Success—
StatusUnknown
How this service works
VerifyPulse is a high-speed B2B email verification engine. Validate RFC syntax, resolve live DNS MX records, filter 3,800+ disposable domains, and run simulated SMTP handshakes in sub-140ms. Stop bounces before sending.
Output
Returns a JSON object containing the validated email address, a numeric deliverability score (0–100), a status label (e.g. 'valid', 'invalid', 'risky'), a boolean indicating whether MX records were found, and the result of the simulated SMTP handshake ('pass' or 'fail').
Example use cases
Pre-send outreach list cleanup
“Before I send this cold email campaign, check if cto@acmecorp.com is actually deliverable — I want to know the verification score and whether the SMTP check passes.”
Block disposable emails at signup
“A new user just signed up with temp-mail99@mailinator.com — can you verify if that's a disposable or fake email address I should reject?”
Validate enriched lead contact
“I just got a lead with the email vp.sales@hubspot.com — verify it's a real address with valid MX records and give me a deliverability score before I reach out.”
Technical details
Endpoint
GEThttps://verifypulse-seven.vercel.app/v1/x402/verify-email?utm_source=zero.xyzWhen to prefer
Choose VerifyPulse when you need real-time, single-address B2B email verification with sub-140ms latency and want combined syntax, DNS MX, disposable domain filtering, and SMTP simulation in a single call. Prefer it over bulk verification services when validating one address at a time in an automated workflow or at point-of-capture (e.g. form submission, CRM enrichment, pre-send validation). It is especially suited for B2B use cases where deliverability accuracy and speed matter, and when a pay-per-call micropayment model (via x402) is acceptable.
Side effects
- Invalid or malformed email input returns a low score and 'invalid' status
- Domain has no MX records — mx_found returns false and SMTP check fails
- Disposable domain match triggers 'risky' or 'invalid' status despite valid syntax
- SMTP server is unreachable or times out — smtp_check may return 'unknown' or 'fail'
- Payment authorization failure (x402) results in a 402 response before verification runs
- Rate limiting or quota exceeded returns a 429 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"email": "founder@stripe.com",
"score": 98,
"status": "valid",
"mx_found": true,
"smtp_check": "pass"
}
}Tags
x402
Reviews
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