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Qonoro Email Validation
x402
Qonoro Email Validation is a paid API for AI agents from api.qonoro.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Validates email deliverability via syntax check, MX record lookup, and SMTP reachability, returning a risk score and quality rating.
Price / call$0.005
Success—
StatusUnknown
How this service works
Validates email deliverability: syntax check, MX record lookup, and SMTP server reachability. Returns risk score and quality rating. Deterministic, sub-second. x402-native.
Output
Returns a risk score (numeric), a quality rating (e.g. high/medium/low/invalid), syntax validity flag, MX record lookup result, and SMTP server reachability status for the provided email address. Response is sub-second and deterministic.
Example use cases
Pre-send email list scrubbing
“Before I launch this email campaign, run deliverability checks on these addresses and flag any with a high risk score so I can remove them from the list.”
Lead qualification for CRM intake
“A new lead just signed up with the email m.harris@startupxyz.io — can you verify it's a real, reachable address before we add them to our CRM?”
Fraud prevention on sign-up form
“A user just registered with contact@tempmail.org — check whether that email is actually deliverable and give me a quality rating so I can decide whether to flag the account.”
Technical details
Endpoint
POSThttps://api.qonoro.ai/v1/email/validateWhen to prefer
Choose this endpoint when you need fast, multi-layer email validation that goes beyond syntax checking — specifically when you need to confirm MX record existence and SMTP server reachability to predict deliverability and get a risk score. Ideal for pre-campaign list hygiene, CRM intake filtering, and fraud screening on sign-up flows where accuracy and sub-second latency both matter.
Side effects
- Malformed email input returns a syntax error without performing further checks
- Unreachable or non-existent domain results in MX lookup failure
- SMTP server behind a catch-all configuration may report reachable even for invalid mailboxes
- Rate limiting or payment failure (x402) may block the request
- Network timeouts on SMTP probe may return inconclusive reachability status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| string | Email address to validate (e.g. 'contact@stripe.com'). | |
| buyer_region | string | Optional privacy-safe buyer region for operational reporting. |
Tags
x402
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