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ONE Engine Email Verify Basic
x402
ONE Engine Email Verify Basic is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0024/call, status unknown (last checked 2026-10-02).
Validates an email address for syntax correctness, MX record existence, disposable domain detection, and role-based address identification
Price / call$0.0024
Success—
StatusUnknown
How this service works
Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.
Output
Returns a JSON object containing the original email, an overall risk level (e.g. 'low'), individual boolean check results for syntax validity, MX record presence, disposable domain detection, and role-based local part detection, plus a scope note clarifying that no SMTP mailbox existence check is performed.
Example use cases
Pre-send email list scrubbing
“Before I send this campaign, check if 'newsletter-signup@tempmail.io' is a real address — I want to know if it has valid syntax, a working MX record, and whether it's a throwaway domain.”
Sign-up form fraud filter
“A new user just registered with 'admin@guerrillamail.com' — validate it and tell me if it's a disposable or role-based email I should reject.”
CRM lead quality check
“I have a sales lead that gave us 'info@bigcorp.net' as their email — can you check if it's valid and flag if it's a role address like a generic inbox?”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v1/email/verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, low-cost email pre-screening at sign-up, lead capture, or list import time — especially when you want syntax, MX, disposable-domain, and role-address checks in a single call without the latency or cost of a full SMTP probe. Ideal for autonomous agents that need to filter obvious junk emails cheaply before investing in deeper verification.
Side effects
- Missing or empty email field returns an error
- Malformed request body causes a 400-level response
- MX lookup may fail for obscure TLDs or newly registered domains
- Disposable domain list may not include the very latest throwaway providers
- Network timeout on upstream DNS resolution for MX checks
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| string | Email address to validate |
Output
Schema · Response
{
"type": "json",
"example": {
"risk": "low",
"email": "user@example.com",
"scope": "Syntax, MX and basic domain heuristics only. No SMTP mailbox existence check.",
"checks": {
"mx_found": true,
"syntax_valid": true,
"disposable_domain": false,
"role_based_local_part": false
},
"product": "email_verify_basic"
}
}Tags
x402
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