# SPF Lookup Budget Estimate for Email Operations

> SPF Lookup Budget Estimate for Email Operations 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 the number of DNS lookup mechanisms in a domain's SPF policy to estimate whether it stays within the 10-lookup RFC limit

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-domain-spf-lookup-count-email-operations?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-estimate-for-email-operations-f0ae912d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pRa52kl7V7FEGKArlSEKA

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-estimate-for-email-operations-f0ae912d -d '<json body>'
```

Example prompt: How many DNS lookups does the SPF record for stripe.com use — I want to know if it's close to the 10-lookup limit.

## When to prefer this

Choose this endpoint when you need a quick, cheap static estimate of SPF lookup depth for a domain without performing full recursive DNS resolution. Ideal for pre-flight checks before adding new email senders, diagnosing SPF permerror causes, or monitoring SPF policy complexity over time. Prefer this over full SPF validation tools when you only need the lookup count and not inbox verification or live DNS chain resolution.

## Known failure modes

- Domain has no SPF record — returns zero or an error indicating no TXT record found
- Invalid or malformed domain input — returns a validation error
- Domain does not exist in DNS — returns a lookup failure
- Network or DNS resolution error during SPF TXT record retrieval
- SPF record is syntactically malformed — may return a parse error or partial count

## How this service works

SPF lookup budget estimate for Email operations: 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-resolving mechanisms (such as include, a, mx, ptr, exists, redirect) found in the domain's SPF record, giving an estimate of how many of the 10 allowed DNS lookups the policy consumes. Does not perform live DNS resolution chains or verify email inbox existence.

## 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-estimate-for-email-operations-f0ae912d/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)