# AgentUtility Email Domain Age Check

> AgentUtility Email Domain Age Check is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns the age, expiry, and flag status of an email domain via WHOIS-based lookup

## Facts

- Endpoint: POST https://x402.agentutility.ai/email-domain-age-check
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentutility-email-domain-age-check-cee4a840
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WYY1Ub8BDG4Gj0Ae5AV17

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 agentutility-email-domain-age-check-cee4a840 -d '<json body>'
```

Example prompt: Can you check how old the domain is for this email address — user@notion.so — and flag it if it looks newly registered or suspicious?

## When to prefer this

Use this endpoint when you need to assess the trustworthiness of an email address by checking how long its domain has been registered, particularly for fraud detection, spam filtering, or lead qualification workflows. Prefer this over manual WHOIS lookups when you need a structured, machine-readable result with flags already computed.

## Known failure modes

- Domain not found in WHOIS — returns empty or null age
- Invalid email or domain format — likely 4xx validation error
- WHOIS lookup timeout or rate limit — service-side error
- Domain uses privacy protection obscuring registration date
- TLD not supported by WHOIS lookup

## How this service works

Paid x402 endpoints organized into product clusters. USDC-settled on Base. MCP-callable. ERC-8004 identity registry agentId 47167.

## Output

A JSON object containing the domain name, its age in days, days remaining until domain expiry, and an array of flags (e.g. newly registered, suspicious) for that domain.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Apex domain to look up (e.g. 'example.com'). Subdomains are stripped to the registrable domain before query."
      },
      "include_certificates": {
       "type": "boolean",
       "description": "If true, fetch a crt.sh certificate-transparency summary (issuer counts, first/last seen, total certs). Default false."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "flags": {
       "type": "array"
      },
      "domain": {
       "type": "string"
      },
      "age_days": {
       "type": "integer"
      },
      "days_until_expiry": {
       "type": "integer"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "flags": [],
  "domain": "notion.so",
  "age_days": 2400,
  "days_until_expiry": 215
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentutility-email-domain-age-check-cee4a840/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.agentutility.ai](https://www.zero.xyz/host/x402.agentutility.ai/llms.txt)