# Lookproof Bulk Mail Configuration Checker

> Lookproof Bulk Mail Configuration Checker is a paid API for AI agents from api.lookproof.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-31).

Checks MX, SPF, and DMARC configuration for up to 20 domains in a single request, returning ordered results with retry tokens for failed checks.

## Facts

- Endpoint: POST https://api.lookproof.dev/v1/mail/check/bulk?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lookproof-bulk-mail-configuration-checker-07efc2ff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-G-5uqy5k3osyP-31vruo

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 lookproof-bulk-mail-configuration-checker-07efc2ff -d '<json body>'
```

Example prompt: Can you run a bulk mail configuration audit on these 15 client domains — checking their MX, SPF, and DMARC records all at once: acme.com, globex.com, initech.com, umbrella.com, cyberdyne.com, soylent.com, oscorp.com, weyland.com, tyrell.com, nakatomi.com, virtucon.com, dharma.com, gringotts.com, bluth.com, and sterling.com?

## When to prefer this

Use this endpoint when you need to audit email configuration (MX, SPF, DMARC) for multiple domains simultaneously — especially for customer lists, brand portfolios, or onboarding pipelines. It is far more efficient than calling a single-domain check 20 times, and the built-in retry token mechanism handles transient DNS failures gracefully. Prefer this over single-domain checks whenever you have 2 or more domains to audit in the same workflow.

## Known failure modes

- Domain unreachable or non-existent returns an error result with a retry token
- More than 20 domains submitted causes a validation error
- Invalid domain string format causes rejection of that item
- Temporary DNS resolver failures produce technical error results with retry tokens
- Network timeout on bulk requests may result in partial results with retry tokens for failed items

## How this service works

Check SPF, DMARC, DKIM, MTA-STS, DNSSEC and more, with results that explain what was found and why. Free browser checks and a pay-per-request API with x402.

## Output

An ordered array of results (matching the order of the input domain list) where each item contains the MX, SPF, and DMARC check outcomes for that domain. Items that failed due to a technical error include a retry token that can be used for a free re-check of that specific domain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domains": {
   "type": "array",
   "items": {
    "type": "string",
    "examples": [
     "example.com"
    ],
    "maxLength": 1024,
    "minLength": 1
   },
   "title": "Domains",
   "maxItems": 20,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lookproof-bulk-mail-configuration-checker-07efc2ff/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.lookproof.dev](https://www.zero.xyz/host/api.lookproof.dev/llms.txt)