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Mail Security DNS Lookup (MX, SPF, DMARC)
x402
Mail Security DNS Lookup (MX, SPF, DMARC) is a paid API for AI agents from x402-canary.nicolas-x402-16f380a7.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).
Checks a domain's mail security posture by verifying presence of MX records, SPF policy, and DMARC policy.
Price / call$0.02
Success—
StatusUnknown
How this service works
Free need-to-tool routing plus pay-per-call npm docs and TypeScript API signatures, npm breaking-change diffs, JavaScript-rendered browser snapshots and deterministic coding-agent checks via AgentCash/x402.
Output
Returns a JSON object with the queried domain and boolean flags indicating whether MX records, SPF records, and DMARC records are present for that domain.
Example use cases
Vendor email security audit
“Before we onboard this vendor, can you check if vendor-corp.com has SPF and DMARC configured so we know their emails won't be spoofed?”
Deliverability troubleshooting
“We're not receiving emails from our partner at clientbrand.io — can you check if they actually have MX and SPF records set up correctly?”
Cold outreach domain vetting
“I'm about to start a cold email campaign targeting leads at startupxyz.com — can you verify they have DMARC protection so I know they're a legit sending domain?”
Technical details
Endpoint
POSThttps://x402-canary.nicolas-x402-16f380a7.workers.dev/v1/domain/mail-securityWhen to prefer
Use this endpoint when you need a quick, structured boolean check on a domain's mail security DNS configuration (MX, SPF, DMARC presence) without needing full record content. Prefer this over raw DNS tools when you want a normalized JSON response consumable by an agent pipeline at a low per-call cost.
Side effects
- Invalid or malformed domain input returns an error
- Non-existent domain may return all false flags rather than an error
- DNS resolution timeouts may cause failures for slow-responding nameservers
- Payment failure via x402 prevents the lookup from executing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"domain": "example.com",
"has_mx": true,
"spf_present": true,
"dmarc_present": true
},
"meta": {
"engine": "domain-enrich"
}
}
}Tags
x402
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