# ChainVerdict Email Security DNS Check API

> ChainVerdict Email Security DNS Check API is a paid API for AI agents from chainverdict.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-11).

Checks a domain's email security DNS records (SPF, DMARC, DKIM) to assess its email authentication posture

## Facts

- Endpoint: GET https://chainverdict.xyz/v1/security/email/%7Bdomain%7D
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chainverdict-email-security-dns-check-api-b1a786d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AVwr6rPSE6x9WMrF4FhwG

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 chainverdict-email-security-dns-check-api-b1a786d9
```

Example prompt: Can you check the email security DNS records for example.com — specifically whether it has SPF, DMARC, and DKIM properly configured?

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call lookup of email authentication DNS records (SPF, DMARC, DKIM) for a single domain without requiring a subscription. It is well-suited for on-demand security checks in agent workflows, phishing investigation pipelines, or vendor onboarding automation where you only occasionally need to audit domains.

## Known failure modes

- Domain does not exist — DNS lookup failure or NXDOMAIN response
- Domain has no SPF/DMARC/DKIM records — returns empty or missing record indicators
- Invalid domain format in path parameter — may return 400 or malformed response
- Payment not provided — HTTP 402 returned with payment requirements before any data
- Rate limiting or transient DNS resolution errors — may require retry

## How this service works

x402 v2 pay-per-call. Unpaid requests receive HTTP 402 with payment requirements.

## Output

Returns DNS-based email authentication record details for the queried domain, including the presence, validity, and configuration of SPF, DMARC, and DKIM records, along with an overall security posture assessment.

## 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"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain to check SPF/DMARC/DKIM"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "additionalProperties": true
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chainverdict-email-security-dns-check-api-b1a786d9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chainverdict.xyz](https://www.zero.xyz/host/chainverdict.xyz/llms.txt)