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chainverdict.xyz Email Authentication Posture Check
x402
chainverdict.xyz Email Authentication Posture Check is a paid API for AI agents from chainverdict.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Checks a domain's email authentication configuration by querying live DNS for SPF record and policy, DMARC policy and alignment, and DKIM selector presence.
Price / call$0.01
Success—
StatusUnknown
How this service works
Email-authentication posture for a domain: SPF record and policy, DMARC policy and alignment, DKIM selector presence. Use it to judge whether mail claiming to be from a counterparty can be trusted. Live DNS.
Output
Returns structured data about the target domain's email authentication posture, including: SPF record content and effective policy (e.g. -all, ~all, none), DMARC policy setting and alignment mode (strict/relaxed), and whether DKIM selectors are present in DNS. Enables a trust judgment on whether mail claiming to originate from that domain is likely authentic.
Example use cases
Vendor email legitimacy check
“I just got a payment request from someone claiming to be at globaltradegroup.com — can you check their SPF, DMARC, and DKIM configuration so I can tell if their email domain is properly authenticated before I send anything?”
Counterparty due diligence before contract signing
“We're about to sign a deal with a company at partnerfirm.io — can you pull their email authentication posture including SPF policy and DMARC alignment so I can flag it for our security team?”
Phishing risk assessment for inbound email
“I received a suspicious email claiming to be from support@bigbank.com — can you check bigbank.com's DMARC policy and SPF record to see if their domain is protected against spoofing?”
Technical details
Endpoint
GEThttps://chainverdict.xyz/v1/security/email/:domainWhen to prefer
Choose this endpoint when you need a fast, live DNS check of a domain's email authentication configuration before trusting an inbound email, processing a payment, or entering a business relationship. It is purpose-built for trust judgments on counterparty email domains and combines SPF, DMARC, and DKIM in a single call — avoiding the need to query multiple DNS resolvers manually. Prefer it over generic DNS lookup tools when you specifically need an interpreted email-security posture assessment rather than raw DNS records.
Side effects
- Domain does not exist or has no DNS records — returns empty or null fields for SPF/DMARC/DKIM
- Domain has no SPF or DMARC configured — records return as absent/none rather than an error
- DKIM selector lookup may be incomplete if non-standard selectors are used
- DNS propagation delays may cause stale results for recently changed records
- Payment not completed — HTTP 402 returned, call not processed
- Invalid domain format in path parameter — returns 4xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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