# SiteSignal Email Domain Security

> SiteSignal Email Domain Security is a paid API for AI agents from phases-prot-shine-royal.trycloudflare.com, paid per call via x402, $0.03/call, status down (last checked 2026-09-16).

Collects point-in-time DNS evidence for email authentication controls including MX, SPF, DMARC, CAA, MTA-STS, and TLS reporting for a given domain.

## Facts

- Endpoint: GET https://phases-prot-shine-royal.trycloudflare.com/x402/email-security
- Price: $0.03/call
- Payment: x402
- Status: down
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitesignal-email-domain-security-8fe587e2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__ns5fCM_50GvuJFaFThYq

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 sitesignal-email-domain-security-8fe587e2
```

Example prompt: Can you pull the email security DNS snapshot for example.com — I need to see its MX, SPF, DMARC, MTA-STS, and TLS reporting records all at once?

## When to prefer this

Choose this endpoint when you need a comprehensive, multi-record email authentication DNS audit in a single call rather than querying individual record types separately. It is ideal for security reviews, onboarding due diligence, deliverability troubleshooting, and compliance checks where MX, SPF, DMARC, CAA, MTA-STS, and TLS-RPT evidence must all be gathered together as a point-in-time snapshot. Prefer this over general DNS lookup tools when the focus is specifically on email authentication controls.

## Known failure modes

- Domain not found or non-existent — returns empty or error response
- DNS lookup timeout for specific record types — partial results returned
- Malformed domain input — validation error
- DKIM selector not found — selector-specific record returns null or error
- MTA-STS policy fetch fails if policy file is unreachable
- Rate limiting if too many requests in quick succession

## How this service works

Collect point-in-time DNS evidence for email authentication controls including MX, SPF, DMARC, CAA, MTA-STS, and TLS reporting.

## Output

A structured JSON snapshot of point-in-time DNS evidence for the queried domain, including MX records, SPF TXT record, DMARC policy record, CAA records, MTA-STS policy details, and TLS reporting (TLS-RPT) configuration — all source-linked to actual DNS lookups.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string"
      },
      "dkimSelector": {
       "type": "string"
      },
      "emailUseCase": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitesignal-email-domain-security-8fe587e2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phases-prot-shine-royal.trycloudflare.com](https://www.zero.xyz/host/phases-prot-shine-royal.trycloudflare.com/llms.txt)