# x402 Web Probe – Domain Info (US Central, St. Louis)

> x402 Web Probe – Domain Info (US Central, St. Louis) is a paid API for AI agents from rockndefi.xyz:8443, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-22).

Performs DNS, TLS certificate, and RDAP/WHOIS lookups for a given domain, returning structured uptime and registration metadata, paid per-call via USDC on Base.

## Facts

- Endpoint: GET https://rockndefi.xyz:8443/v1/domain?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-web-probe-domain-info-us-central-st-louis-b714ae9e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tzm7uqCEZqjWZMZ3NPYnr

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 x402-web-probe-domain-info-us-central-st-louis-b714ae9e
```

Example prompt: Can you check the DNS records, TLS certificate status, and registration details for example.com — I want to know the A records, who the registrar is, and how many days are left on the cert?

## When to prefer this

Use this endpoint when you need a quick, structured snapshot of a domain's DNS records, TLS certificate health, and registration details in a single call without requiring an account or API key. It is ideal for lightweight, pay-per-use domain intelligence checks from a US Central vantage point, particularly when integrating with x402 micropayment workflows on Base.

## Known failure modes

- Domain does not exist — DNS lookup returns empty or NXDOMAIN
- TLS check fails if the domain has no HTTPS/SSL endpoint
- RDAP data unavailable for some TLDs or private registrations
- Payment failure via x402/USDC prevents the call from completing
- Timeout if DNS or RDAP servers are slow to respond
- Invalid domain format in query parameter returns an error

## How this service works

Pay-per-call website uptime/latency/TLS checks and fetch-to-Markdown, measured from US Central (St. Louis). USDC on Base via x402. No account or API key.

## Output

A JSON object containing DNS records (A, MX, NS arrays), TLS certificate details (issuer name, days remaining), RDAP registration data (creation date, expiry date, registrar name), and the queried domain name. All data is measured/resolved from US Central (St. Louis).

## 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",
       "description": "Registrable domain or hostname, e.g. example.com"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "dns": {
       "type": "object"
      },
      "tls": {
       "type": "object"
      },
      "rdap": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "dns": {
   "A": [
    "93.184.215.14"
   ],
   "MX": [],
   "NS": [
    "a.iana-servers.net"
   ]
  },
  "tls": {
   "issuer": "DigiCert Inc",
   "days_left": 60
  },
  "rdap": {
   "created": "1995-08-14T04:00:00Z",
   "expires": "2026-08-13T04:00:00Z",
   "registrar": "RESERVED-Internet Assigned Numbers Authority"
  },
  "domain": "example.com"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-web-probe-domain-info-us-central-st-louis-b714ae9e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from rockndefi.xyz:8443](https://www.zero.xyz/host/rockndefi.xyz%3A8443/llms.txt)