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SPF Policy Lookup
x402
SPF Policy Lookup is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).
Fetches and parses the SPF TXT DNS record for a given domain to reveal its email sender authorization policy.
Price / call$0.01
Success—
StatusUnknown
How this service works
SPF policy lookup for Security review: Return and parse the domain SPF TXT policy. DNS data only; does not send email or verify that an inbox exists.
Output
Returns the raw SPF TXT DNS record string for the queried domain along with a parsed breakdown of its mechanisms (e.g. ip4, ip6, include, a, mx, all qualifiers), enabling the caller to understand which mail servers are authorized to send on behalf of the domain.
Example use cases
Security audit of vendor domain
“I'm reviewing a third-party vendor before onboarding them — can you pull and parse the SPF record for vendorcorp.com so I can see which mail servers they authorize?”
Phishing investigation triage
“We received a suspicious email claiming to be from payments.acme.io — can you fetch the SPF policy for acme.io so I can check whether the sending IP would even be permitted?”
Pre-deployment email config check
“Before we go live, can you check the SPF DNS record for our new domain startupco.com to confirm it's properly set up and includes our SendGrid servers?”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/demand-domain-spf-policy-security-review?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to inspect or validate a domain's SPF email-sending policy via DNS, particularly for security reviews, phishing investigations, email deliverability audits, or compliance checks. It is a read-only DNS lookup — prefer it over email verification services when you only need the DNS policy itself, not inbox existence or deliverability testing.
Side effects
- Domain does not exist — DNS NXDOMAIN error returned
- Domain exists but has no SPF TXT record published
- Domain has multiple SPF records (RFC violation) — may return error or first found
- Malformed SPF record that cannot be parsed
- DNS resolution timeout or network error
- Too many DNS lookups in SPF chain (exceeds RFC 7208 limit of 10)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | Public DNS domain, e.g. example.com. |
Tags
x402
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