# Toll402 RDAP Domain Lookup

> Toll402 RDAP Domain Lookup is a paid API for AI agents from toll402.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).

Performs an RDAP (Registration Data Access Protocol) lookup for a domain name, returning structured registration and ownership data.

## Facts

- Endpoint: POST https://toll402.dev/v1/t/rdap_domain_lookup?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/toll402-rdap-domain-lookup-58f4a14a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_o-srbWKya_T2F8QPWKiHQ

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 toll402-rdap-domain-lookup-58f4a14a -d '<json body>'
```

Example prompt: Can you do an RDAP lookup on openai.com and tell me who the registrar is, when it was registered, and when it expires?

## When to prefer this

Use this endpoint when you need structured, machine-readable domain registration data in RDAP format rather than raw WHOIS text. Prefer it over WHOIS scraping for reliable, standardized JSON output. Best for due diligence, domain monitoring, ownership investigation, or any workflow that needs authoritative registration metadata per call at low cost with no API key setup.

## Known failure modes

- Domain not found or unregistered — RDAP may return empty or error response
- Invalid domain name format — validation failure before lookup
- RDAP registry timeout — upstream registry may be slow or unreachable
- TLD not covered by RDAP — some ccTLDs may not have RDAP endpoints
- Rate limiting from upstream RDAP registry

## How this service works

The OpenRouter for AI-agent tools: one gateway, one wallet, every capability. Built-in tools, forged tools, a global verified business directory and 2,000+ aggregated x402 services, all paid per call in USDC via x402 (HTTP 402). No signup, no API key.

## Output

Returns a JSON object with structured RDAP data for the queried domain, including registrar name, registration and expiry dates, domain status flags, nameserver list, and optionally registrant contact details where publicly available. The response indicates success with an 'ok' flag.

## 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": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain name to look up, e.g. example.com"
      }
     },
     "additionalProperties": 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"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/toll402-rdap-domain-lookup-58f4a14a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from toll402.dev](https://www.zero.xyz/host/toll402.dev/llms.txt)