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Straelo Relay Email Validator (Basic)
x402
Straelo Relay Email Validator (Basic) is a paid API for AI agents from relay.straelo.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).
Validates an email address for syntax correctness, domain existence, and MX record presence
Price / call$0.005
Success—
StatusUnknown
How this service works
Validate email syntax, domain and MX records for basic automated checks without SMTP mailbox verification.
Output
Returns a JSON object indicating whether the email is valid overall (boolean), the parsed domain, whether MX records were found (boolean), and an array of reasons explaining any failures or issues detected.
Example use cases
User registration email screening
“Before I add this new user to my system, can you check if the email they gave me — signups@newbizco.net — is actually valid and has working mail servers?”
Marketing list hygiene check
“I have a contact email I want to add to our newsletter list: info@partnercompany.org — can you verify it's syntactically correct and has a real mail domain before I add it?”
Lead form submission validation
“Someone just submitted the contact form with the email address cto@techventures.io — can you run a quick check to see if it's a legitimate, deliverable address?”
Technical details
Endpoint
POSThttps://relay.straelo.com/email-validator/basic?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-use email check that covers syntax, domain existence, and MX record validation in a single call without managing your own DNS resolution infrastructure. Ideal for agent workflows that need to gate on email validity before sending messages, storing contacts, or processing registrations. Not suited for deep mailbox-level verification (SMTP handshake) or bulk batch validation of large lists.
Side effects
- Malformed or missing email input returns a validation error
- Transient DNS lookup failures may cause MX check to report false negatives
- Newly registered domains may not yet have propagated MX records, causing false invalids
- Disposable or catch-all domains may appear valid even if mailbox does not exist
- Network timeouts on relay.straelo.com return HTTP 5xx errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| string | Email address for syntax, domain and MX validation. |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"domain": "example.com",
"reasons": [],
"mx_found": true
}
}Tags
x402
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