# Otto AI WHOIS Lookup

> Otto AI WHOIS Lookup is a paid API for AI agents from x402.ottoai.services, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Looks up WHOIS/RDAP registration data for a domain, returning registrar, creation/expiry dates, nameservers, DNSSEC status, and transfer statuses.

## Facts

- Endpoint: GET https://x402.ottoai.services/whois-lookup
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/otto-ai-whois-lookup-02b051f3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UJ5_WO-UezvBgZSO0DAVf

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 otto-ai-whois-lookup-02b051f3
```

Example prompt: Can you look up the WHOIS registration details for stripe.com — I want to know who the registrar is, when it was created, when it expires, and what nameservers it's using?

## When to prefer this

Use this endpoint when you need authoritative domain registration metadata — registrar, creation/expiry dates, nameservers, DNSSEC, and status flags — for a single registrable domain. Prefer this over generic WHOIS tools when you need structured JSON output with freshness metadata and pay-per-use pricing via x402/USDC with no subscription required.

## Known failure modes

- 503 returned (and not charged) for ccTLDs that lack RDAP support
- Domain not found if the domain is unregistered or input is malformed
- Invalid domain format may result in an error or empty response
- Network/upstream RDAP registry outages may cause degraded responses (meta.degraded=true)

## How this service works

Registration data for any domain, straight from authoritative RDAP registries (the structured WHOIS successor): registrar, ICANN/EPP domain status codes, creation, last-updated and expiration dates, authoritative nameservers, and DNSSEC delegation. The fast, license-clean way for an agent to vet a domain, sender, or counterparty. Keyless, structured JSON, pay-per-call.

## Output

Returns a JSON object with domain registration data including: registrar name, creation/expiry/updated timestamps, list of nameservers, DNSSEC flag, transfer/delete status codes, and a meta block with freshness info (generatedAt, validUntil, stalenessSec). Returns 503 uncharged for ccTLDs without RDAP support.

## 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 to look up (e.g. stripe.com). ccTLDs without RDAP return 503 uncharged."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "status"
     ],
     "properties": {
      "data": {},
      "meta": {
       "type": "object"
      },
      "reason": {
       "type": "string",
       "description": "status=unavailable only; every >=400 is UNCHARGED"
      },
      "status": {
       "enum": [
        "success",
        "unavailable"
       ],
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "dnssec": false,
   "domain": "stripe.com",
   "statuses": [
    "client delete prohibited",
    "client transfer prohibited"
   ],
   "createdAt": "2009-10-15T19:08:36Z",
   "expiresAt": "2026-10-15T19:08:36Z",
   "registrar": "MarkMonitor Inc.",
   "updatedAt": "2024-09-10T09:16:32Z",
   "registered": true,
   "generatedAt": "2026-06-24T12:00:00.000Z",
   "nameservers": [
    "ns-1234.awsdns-26.org",
    "ns-456.awsdns-57.com"
   ]
  },
  "meta": {
   "degraded": false,
   "validUntil": "",
   "generatedAt": "",
   "stalenessSec": 0
  },
  "status": "success"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/otto-ai-whois-lookup-02b051f3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.ottoai.services](https://www.zero.xyz/host/x402.ottoai.services/llms.txt)