# SignalDesk AI DMARC Lookup

> SignalDesk AI DMARC Lookup is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-13).

Fetches and parses DMARC DNS records for a given domain, returning raw record strings and structured policy fields.

## Facts

- Endpoint: GET https://x402-agent.kariguetoazul.workers.dev/api/security/dmarc?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-dmarc-lookup-b02ed5c6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HvRB8Cda2kIVGXgBEfOLO

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 signaldesk-ai-dmarc-lookup-b02ed5c6
```

Example prompt: Can you check the DMARC policy for stripe.com — I want to know if it's set to reject and what the RUA reporting address is?

## When to prefer this

Choose this endpoint when you need a structured, parsed DMARC policy rather than a raw DNS TXT lookup — it handles parsing policy tags and provides source provenance metadata. Prefer it for email security audits, deliverability checks, and phishing risk assessments where you need the p= policy value and rua address without building your own DNS parser.

## Known failure modes

- Domain has no _dmarc TXT record — returns empty records array
- Invalid or malformed domain string — schema validation error
- DNS resolution failure — upstream Cloudflare DNS error
- Domain too short or too long — rejected by minLength/maxLength constraints
- Rate limiting or quota exhaustion — HTTP 402 or 429 response

## How this service works

Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.

## Output

Returns the domain queried, the DMARC TXT record as a raw string, structured policy fields (p, v, rua, etc.), and DNS source metadata including the provider used, the source URL, fetch timestamp, and expiry time.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "maxLength": 253,
       "minLength": 3,
       "description": "ASCII/punycode domain."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "domain": "google.com",
  "source": {
   "provider": "Cloudflare DNS over HTTPS",
   "expires_at": "2026-10-02T09:54:48.067Z",
   "fetched_at": "2026-10-02T09:44:48.067Z",
   "source_url": "https://cloudflare-dns.com/dns-query?name=_dmarc.google.com&type=TXT&do=true",
   "transformed": true
  },
  "records": [
   "v=DMARC1; p=reject; rua=mailto:mailauth-reports@google.com"
  ],
  "policies": [
   {
    "p": "reject",
    "v": "DMARC1",
    "rua": "mailto:mailauth-reports@google.com"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-dmarc-lookup-b02ed5c6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.kariguetoazul.workers.dev](https://www.zero.xyz/host/x402-agent.kariguetoazul.workers.dev/llms.txt)