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SPF Lookup Budget Estimator for Vendor Screening
x402
SPF Lookup Budget Estimator for Vendor Screening 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).
Counts DNS lookup mechanisms in an SPF record to estimate whether a domain's SPF policy stays within the 10-lookup RFC limit, for vendor screening purposes.
Price / call$0.01
Success—
StatusUnknown
How this service works
SPF lookup budget estimate for Vendor screening: Count common DNS lookup mechanisms in an SPF policy; this is a static estimate. DNS data only; does not send email or verify that an inbox exists.
Output
Returns a static count of the DNS-resolving mechanisms (such as 'include', 'a', 'mx', 'ptr', 'exists') found in the domain's SPF record, giving an estimated number of lookups the policy will consume. Does not perform live DNS resolution of all nested records or verify inbox existence.
Example use cases
Third-party vendor email compliance check
“We're onboarding Acme Corp and their domain is acmecorp.com — can you check how many DNS lookups their SPF record uses so I know if it's compliant before we integrate their email system?”
SPF budget headroom check before adding include
“Before I add another include statement to our vendor's SPF record at vendorco.com, can you estimate how many DNS lookups they're already using so I know if there's room?”
Bulk vendor screening for email hygiene
“I'm screening a list of potential suppliers. Can you start by checking the SPF lookup count for mailchimp.com so I can flag anyone close to the 10-lookup RFC limit?”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/demand-domain-spf-lookup-count-vendor-screening?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, cheap, static estimate of how many DNS lookups a domain's SPF record consumes — particularly during vendor onboarding or screening workflows. Prefer it over full SPF validation tools when you only need the lookup count for budget compliance checks and do not need live email verification or inbox validation.
Side effects
- Domain has no SPF record — returns empty or zero count
- Domain does not exist in DNS — lookup fails with error
- Malformed SPF record — parser may return partial results
- Nested includes not recursively resolved — count may underestimate true lookup depth
- Rate limiting or DNS timeout — transient failure with error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | Public DNS domain, e.g. example.com. |
Tags
x402
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