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DelX Email Validator
x402
DelX Email Validator is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Validates an email address and its domain-level DNS delivery records (MX, SPF, DKIM) to confirm deliverability before outreach, signup, or routing.
Price / call$0.01
Success—
StatusUnknown
How this service works
Validate an email and its domain-level delivery records before outreach, signup, or routing.
Output
Returns a structured validation result including whether the email address is syntactically valid, whether the domain has active MX records, SPF and DKIM configuration status, overall deliverability assessment, and any flags indicating the email is risky or undeliverable.
Example use cases
Example prompt
“Can you validate whether john.doe@acmecorp.com is a real, deliverable email address — check the domain's MX records and DNS delivery configuration so I know it's safe to include in our outreach list?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/email-validateWhen to prefer
Use this endpoint when you need to verify both the syntactic validity of an email address AND confirm the domain's DNS delivery infrastructure (MX, SPF, DKIM) is properly configured before sending outreach, accepting a signup, or routing a message. Prefer this over simple regex-based email checks when domain-level deliverability confidence is required.
Side effects
- Invalid or malformed email address input returns a validation error
- Domain has no MX records — email cannot be delivered
- DNS lookup timeout or failure for the domain
- Email address uses a disposable/temporary domain and is flagged
- Rate limiting if too many calls are made in quick succession
- Payment failure via x402 protocol preventing the call from completing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| string | ||
| timeout | integer |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"domain": "example.com",
"a_records": [
"93.184.216.34"
],
"mx_records": [
"10 mx.example.com."
],
"normalized": "agent@example.com",
"syntax_valid": true,
"likely_deliverable": true
},
"tool_name": "util_email_validate"
}
}Tags
x402
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