SiteCheck Domain RDAP/DNS Lookup

x402

SiteCheck Domain RDAP/DNS Lookup is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-12).

Looks up domain registration details (RDAP) and DNS records for a given domain or URL, returning registrar, dates, nameservers, IP addresses, MX records, and availability.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-call tools for AI agents: image generation, speech-to-text, text-to-speech, embeddings, LLM chat, website audits and contact enrichment, web page to Markdown reader, PDF to text, sitemap URLs, tech stack detection, translation, exchange rates, e-mail pre-check, domain RDAP/DNS lookup, Solana token checks, trending tokens and wallet holdings, plus business and compliance data (EU VAT/VIES, IBAN, LEI/GLEIF, US recalls, OSHA/EPA violations, UK insolvency notices). Plus prediction-market search, briefs, quotes and unsigned buy transactions, powered by Panta. Payment: x402, USDC on Base, Solana or Arc. No signup, no API key.

Output

A JSON object containing: DNS records (MX, IPv4, IPv6, null MX flag, resolves flag), DNSSEC status, domain name, registrar name and IANA ID, creation/update/expiry dates, days until expiry, nameservers, RDAP status codes, availability status, registrant country and organisation, and whether RDAP data was available.

Example use cases

Domain expiry monitoring for portfolio

“Check the registration details for mybrand.com — I need to know when it expires, who the registrar is, and whether DNSSEC is enabled.”

Vetting a supplier's domain legitimacy

“Look up acme-suppliers.com for me and tell me how old the domain is, who registered it, and what country the registrant is in — I want to make sure it's a legitimate business before we proceed.”

Email deliverability pre-check

“Can you pull the DNS records for newsletter-platform.io and tell me what MX records it has and whether the domain actually resolves? I need to know if it's set up properly for email.”

Technical details

Endpoint

GEThttps://api.sitecheck-api.workers.dev/api/domain?utm_source=zero.xyz

When to prefer

Use this endpoint when you need authoritative domain registration data (RDAP) combined with live DNS resolution in a single call — especially useful for domain vetting, expiry monitoring, email deliverability checks, or cybersecurity investigations. Prefer this over generic WHOIS tools when you need structured JSON output including both registry metadata and DNS records (MX, A, AAAA) without signing up for an API key.

Side effects

Domain not found or unregistered — returns availability: 'unregistered' with limited data
TLD not supported by RDAP — rdapAvailable: false, partial data only
Invalid domain format — may return an error or empty result
Network timeout reaching registry RDAP server — may return partial or no data
Rate limiting by upstream RDAP registry — delayed or failed response

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "dns": {
      "mx": [
        "mx-in1001.wikimedia.org"
      ],
      "ipv4": [
        "185.15.59.224"
      ],
      "ipv6": [
        "2a02:ec80:300:ed1a::1"
      ],
      "nullMx": false,
      "resolves": true
    },
    "note": "From the registry's RDAP service.",
    "dnssec": false,
    "domain": "wikipedia.org",
    "source": "IANA RDAP bootstrap + the TLD registry's RDAP server; DNS over HTTPS (Cloudflare, Google)",
    "ageDays": 9399,
    "createdAt": "2001-01-13T00:12:14.000Z",
    "expiresAt": "2027-01-13T00:12:14.000Z",
    "registrar": "MarkMonitor Inc.",
    "updatedAt": "2025-12-13T09:51:53.000Z",
    "registered": true,
    "nameServers": [
      "ns0.wikimedia.org",
      "ns1.wikimedia.org"
    ],
    "statusCodes": [
      "client delete prohibited",
      "client transfer prohibited"
    ],
    "availability": "registered",
    "rdapAvailable": true,
    "daysUntilExpiry": 461,
    "registrarIanaId": "292",
    "registeredDomain": "wikipedia.org",
    "registrantCountry": "US",
    "registrantOrganisation": "Wikimedia Foundation, Inc."
  }
}

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