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emailval Email Validator
x402
emailval Email Validator is a paid API for AI agents from x402-emailval.shablony-pro.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Validates an email address for syntax correctness, MX record existence, and disposable/throwaway domain status
Price / call$0.003
Success—
StatusUnknown
How this service works
Email validation (syntax, MX, disposable check). x402 pay-per-call, 0.003 USDC on Base.
Output
Returns a JSON object with a 'verdict' field (e.g. 'deliverable_likely') indicating the overall assessment, and an 'mx_found' boolean indicating whether valid MX DNS records were found for the email domain. May also include disposable domain detection status.
Example use cases
Signup form email screening
“Before we create an account for this new user, can you validate their email address jane.smith@tempmail.io and tell me if it's deliverable and whether it's from a disposable provider?”
CRM data quality check
“I have a lead email address — b.johnson@acmecorp.com — can you verify it's syntactically valid and that the domain actually accepts email, so we know it's worth reaching out?”
Bulk onboarding pre-filter
“We're about to send welcome emails to a new batch of signups. Can you validate the address newuser@guerrillamail.com and tell me if it's a throwaway so we can decide whether to block it?”
Technical details
Endpoint
GEThttps://x402-emailval.shablony-pro.workers.dev/validateWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call email validation that combines syntax checking, DNS/MX record verification, and disposable domain detection in a single call. Ideal for agents handling user signups, lead qualification, or data hygiene workflows where you want to avoid sending to bad addresses without committing to a high-volume subscription. At $0.003 per call on Base via x402, it suits low-to-medium volume use cases where cost predictability matters.
Side effects
- Malformed or missing email parameter returns an error or unexpected verdict
- Domains with unusual or private DNS configurations may produce false negatives on MX checks
- Newly registered disposable domains not yet in blocklists may pass disposable check
- Network timeouts during MX DNS lookup may cause failed or inconclusive responses
- Payment failure (insufficient USDC balance) blocks the request before validation occurs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| schema | string |
Output
Schema · Response
{
"type": "json",
"example": {
"verdict": "deliverable_likely",
"mx_found": true
}
}Tags
x402
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