# SPF Lookup Budget Estimator

> SPF Lookup Budget Estimator 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 is within the 10-lookup limit, as a static analysis for security review.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-domain-spf-lookup-count-security-review?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/spf-lookup-budget-estimator-8f4db4fc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EBIpDwbKMhrmE_aOJnGf4

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability spf-lookup-budget-estimator-8f4db4fc -d '<json body>'
```

Example prompt: How many DNS lookups does the SPF record for example.com use — is it within the 10-lookup budget?

## When to prefer this

Use this endpoint when you need a quick, cheap static estimate of SPF DNS lookup usage for a domain during security reviews, email configuration audits, or deliverability troubleshooting. It is ideal when you don't need full recursive DNS resolution — just a structural count of mechanisms. Choose this over a full SPF validator when speed and cost matter more than recursive accuracy.

## Known failure modes

- Domain has no SPF record — returns error or zero count
- Invalid or malformed domain input — request rejected
- Domain does not exist in DNS — lookup fails
- SPF record is syntactically malformed — parsing may fail or return partial count
- Network or DNS resolution timeout when fetching SPF TXT record

## How this service works

SPF lookup budget estimate for Security review: 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 DNS lookup mechanisms (such as include, a, mx, ptr, exists) found in the domain's SPF record, giving an estimate of how much of the 10-lookup budget is consumed. No live DNS resolution chain is followed; this is a syntactic/structural count.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain": {
   "type": "string",
   "default": "example.com",
   "description": "Public DNS domain, e.g. example.com."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/spf-lookup-budget-estimator-8f4db4fc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)