# SDN Wallet Screen + DNS & Email-Auth — DNS Lookup Endpoint (x402)

> SDN Wallet Screen + DNS & Email-Auth — DNS Lookup Endpoint (x402) is a paid API for AI agents from sdn-screen-x402.sdnscreen.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Performs a live DNS record lookup for a given domain, returning all or filtered DNS record types, paid per-call at $0.01 USDC via x402.

## Facts

- Endpoint: GET https://sdn-screen-x402.sdnscreen.workers.dev/v1/dns?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sdn-wallet-screen-dns-email-auth-dns-lookup-endpoint-x402-1ff859f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7slJNTjXgAIbMTCCOmWrQ

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 sdn-wallet-screen-dns-email-auth-dns-lookup-endpoint-x402-1ff859f4
```

Example prompt: Look up all the DNS records for stripe.com — I want to see the A, MX, and TXT records especially.

## When to prefer this

Choose this endpoint when you need a live, authoritative DNS record lookup without setting up API keys or accounts, and you are comfortable with micro-payment billing via x402/USDC on Base. It is especially useful for AI agent pipelines that need on-demand DNS resolution as part of domain validation, email deliverability checking, or infrastructure inspection workflows.

## Known failure modes

- Domain does not exist in DNS — returns exists: false with empty records
- Invalid or malformed domain name — may return error or empty result
- Unsupported record type string — ignored or returns all records
- Upstream DNS resolver timeout — may return partial or error response
- Payment not completed via x402 — request rejected before DNS lookup is performed

## How this service works

Six keyless pay-per-call tools for AI agents: OFAC SDN crypto-wallet screen, live DNS records lookup, SPF/DMARC/DKIM email-auth check, domain age/registrar (RDAP), email address MX verify and URL unshorten/redirect check. $0.01 per call: USDC on Base over x402, or USDC on Tempo over MPP. Also a remote MCP server at /mcp (x402).

## Output

A JSON object containing the queried domain name, an 'exists' boolean, and a 'records' map keyed by DNS record type. Each record type entry includes a status (e.g. NOERROR), an 'authenticated' boolean (DNSSEC), and an array of answers with name, type, TTL, and data fields.

## 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": [
      "name"
     ],
     "properties": {
      "name": {
       "type": "string",
       "examples": [
        "example.com"
       ],
       "maxLength": 253,
       "minLength": 3,
       "description": "Domain or hostname, e.g. example.com. A full URL or email address is accepted and reduced to its host. Alias: domain."
      },
      "type": {
       "enum": [
        "ALL",
        "A",
        "AAAA",
        "CNAME",
        "MX",
        "NS",
        "TXT",
        "SOA",
        "CAA",
        "SRV",
        "PTR",
        "DS",
        "DNSKEY",
        "HTTPS"
       ],
       "type": "string",
       "default": "ALL",
       "description": "ALL (default: A, AAAA, CNAME, MX, NS, TXT, SOA, CAA) or one record type."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "name",
      "exists",
      "records",
      "resolver",
      "queriedAt"
     ],
     "properties": {
      "name": {
       "type": "string"
      },
      "exists": {
       "type": "boolean",
       "description": "false when the resolver returned NXDOMAIN"
      },
      "records": {
       "type": "object",
       "description": "One entry per requested record type",
       "additionalProperties": {
        "type": "object",
        "required": [
         "status",
         "authenticated",
         "answers"
        ],
        "properties": {
         "error": {
          "type": "string"
         },
         "status": {
          "enum": [
           "NOERROR",
           "NXDOMAIN",
           "SERVFAIL",
           "REFUSED",
           "FORMERR",
           "NOTIMP",
           "ERROR"
          ],
          "type": "string"
         },
         "answers": {
          "type": "array",
          "items": {
           "type": "object",
           "required": [
            "name",
            "type",
   
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "name": "example.com",
  "exists": true,
  "records": {
   "A": {
    "status": "NOERROR",
    "answers": [
     {
      "ttl": 34,
      "data": "172.66.147.243",
      "name": "example.com",
      "type": "A"
     },
     {
      "ttl": 34,
      "data": "104.20.23.154",
      "name": "example.com",
      "type": "A"
     }
    ],
    "authenticated": true
   },
   "MX": {
    "status": "NOERROR",
    "answers": [
     {
      "ttl": 300,
      "data": "0 .",
      "name": "example.com",
      "type": "MX"
     }
    ],
    "authenticated": true
   },
   "NS": {
    "status": "NOERROR",
    "answers": [
     {
      "ttl": 79225,
      "data": "hera.ns.cloudflare.com.",
      "name": "example.com",
      "type": "NS"
     },
     {
      "ttl": 79225,
      "data": "elliott.ns.cloudflare.com.",
      "name": "example.com",
      "type": "NS"
     }
    ],
    "authenticated": true
   },
   "CAA": {
    "status": "NOERROR",
    "answers": [],
    "authenticated": true
   },
   "SOA": {
    "status": "NOERROR",
    "answers": [
     {
      "ttl": 1800,
      "data": "elliott.ns.cloudflare.com. dns.cloudflare.com. 2416374680 10000 2400 604800 1800",
      "name": "example.com",
      "type": "SOA"
     }
    ],
    "authenticated": true
   },
   "TXT": {
    "status": "NOERROR",
    "answers": [
     {
      "ttl": 288,
      "data": "v=spf1 -all",
      "name": "example.com",
      "type": "TXT"
     }
    ],
    "authenticated": true
   },
   "AAAA": {
    "status": "NOERROR",
    "answers": [
     {
      "ttl": 12,
      "data": "2606:4700:10::ac42:93f3",
      "name": "example.com",
      "type": "AAAA"
     }
    ],
    "authenticated": true
   },
   "CNAME": {
    "status": "NOERROR",
    "answers": [],
    "authenticated": true
   }
  },
  "resolver": "Cloudflare 1.1.1.1 (DNS over HTTPS)",
  "queriedAt": "2026-10-11T23:55:37.349Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sdn-wallet-screen-dns-email-auth-dns-lookup-endpoint-x402-1ff859f4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sdn-screen-x402.sdnscreen.workers.dev](https://www.zero.xyz/host/sdn-screen-x402.sdnscreen.workers.dev/llms.txt)