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GeekVault Email Auth Check (SPF/DMARC Lookup)
x402
GeekVault Email Auth Check (SPF/DMARC Lookup) is a paid API for AI agents from api.geekvault.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Checks a domain's email authentication records (SPF and DMARC) to assess its email security configuration.
Price / call$0.002
Success—
StatusUnknown
How this service works
Network, docs, image, web, and dev utility tools paid per call via x402. No signup, no API keys, no subscriptions — just USDC on Base.
Output
Returns the queried host, the SPF record string (or null if absent), the DMARC record string (or null if absent), and a human-readable note summarizing the authentication status of the domain.
Example use cases
Pre-send email deliverability audit
“Before I launch this email campaign, can you check if my domain mailchimp-partner.com has valid SPF and DMARC records configured so my emails don't land in spam?”
Security audit for suspicious sender domain
“I got an email from someone claiming to be at bigcorp.io — can you check whether that domain has proper SPF and DMARC email authentication set up so I can tell if it's likely spoofed?”
Onboarding vendor email domain check
“We're onboarding a new vendor whose invoices come from payments.vendorco.com — can you verify their email domain has SPF and DMARC records before we whitelist them?”
Technical details
Endpoint
GEThttps://api.geekvault.dev/net-tools/v1/email-auth-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, no-signup DNS lookup for SPF and DMARC records on any domain, particularly for email security auditing, deliverability checks, or anti-spoofing validation. It is ideal for agents that need frictionless per-call access without managing API keys. Prefer this over manual DNS lookup tools when you want a structured JSON response with a plain-language note.
Side effects
- Domain does not exist — returns null SPF and DMARC with an explanatory note
- DNS timeout or resolution failure — may return error or empty records
- Invalid host format provided — likely 400 or error note
- Domain has no email authentication records at all — returns nulls with note indicating missing configuration
- Payment not provided or insufficient USDC — 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hostrequired | string |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| spf | — | |
| hostrequired | string | |
| noterequired | string | |
| dmarc | — |
Tags
x402
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