# Agent Tollgate Engine – Email Security Check

> Agent Tollgate Engine – Email Security Check is a paid API for AI agents from skinwinking.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).

Checks a domain's email security configuration by looking up SPF, DMARC, and related DNS records and reporting any issues found.

## Facts

- Endpoint: GET https://skinwinking.com/api/v1/web/email-security?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-tollgate-engine-email-security-check-805f8ac8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fiqQpI3toT4AVHoh3ZxGa

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 agent-tollgate-engine-email-security-check-805f8ac8
```

Example prompt: Can you check the email security setup for example.com — specifically whether they have SPF and DMARC configured and if there are any issues?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call check of a domain's email security posture (SPF/DMARC) without setting up your own DNS tooling. It is especially useful in agent workflows that screen vendor or partner domains, audit client infrastructure, or validate outbound email configuration before campaigns. At $0.002 per call it is cost-effective for one-off or low-volume domain checks.

## Known failure modes

- Invalid or non-existent domain returns an error or empty result
- Domain with no DNS records may return all fields as absent or false
- Network/DNS lookup timeout may result in a generic error response
- Malformed domain input (e.g. including protocol prefix) may cause a validation error

## How this service works

50 pay-per-call tools for agents over x402 (USDC on Base, Polygon, Solana): crypto market data, token audits, indicators, swap routing, web extraction, DNS/WHOIS/email checks, FX, weather and AI text/image tools.

## Output

A JSON object containing SPF presence status, DMARC policy (e.g. 'reject', 'quarantine', 'none'), and a list of detected email security issues (empty array if none found).

## 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",
       "description": "Domain name"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "spf": {
   "present": true
  },
  "dmarc": {
   "policy": "reject"
  },
  "issues": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-tollgate-engine-email-security-check-805f8ac8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from skinwinking.com](https://www.zero.xyz/host/skinwinking.com/llms.txt)