🌐 RDAPclient

RDAPclient is a blazing-fast domain lookup service powered by Next.js and RDAP. It features a responsive web UI and a clean JSON-based API for retrieving domain registration data in real-time.

✨ Features

• 🌍 Web Interface: Perform WHOIS lookups directly from a clean and modern browser interface.
• ⚡ Fast API: Programmatic access to RDAP data using a REST-style endpoint.
• 📄 Rich JSON Output: Includes registrar, expiration/registration dates, DNSSEC, EPP status (with official links), nameservers, and RDAP server.
• 🔐 CORS Enabled: Easily consumable by frontend apps.
• 📘 ICANN EPP Labels: Domain status codes are linked to ICANN’s official registry.
• 🌐 Standards-Based: Built on top of the RDAP protocol defined by the IETF.

🆚 RDAP vs WHOIS

Feature	WHOIS	RDAP
Standardized Format	❌ Inconsistent across registries	✅ JSON format, standardized
Secure Access (HTTPS)	❌ Typically plain text over port 43	✅ Always delivered over HTTPS
Internationalization Support	❌ No Unicode support	✅ Full support for internationalized data
Access Control	❌ No user-based access differentiation	✅ Can provide tiered access (public vs. privileged data)
Searchability	❌ Limited or unavailable	✅ Supports entity/domain queries
Extensibility	❌ Very limited	✅ Easily extensible with new fields and capabilities
Service Discovery	❌ Manual or unclear	✅ Built-in mechanisms for registry discovery
Machine Readable	❌ Hard to parse	✅ Easy to integrate into apps & services

📝 ICANN Announcement “As of 28 January 2025, the Registration Data Access Protocol (RDAP) will be the definitive source for delivering generic top-level domain name (gTLD) registration information in place of sunsetted WHOIS services. RDAP offers several advantages over WHOIS including support for internationalization, secure access to data, authoritative service discovery, and the ability to provide differentiated access to registration data. RDAP was developed by the Internet Engineering Task Force.”

➡️ Source – ICANN Announcement (27 Jan 2025)

📡 API Documentation

Query domain WHOIS/RDAP records programmatically.

🔗 Endpoint

GET https://rdap.sayed.app/api/[domain]

Replace [domain] with a valid domain like example.com.

✅ Example Request

GET https://rdap.sayed.app/api/lookup/abusayed.dev

📦 Example Response

{
  "domainName": "abusayed.dev",
  "registrar": "CloudFlare, Inc.",
  "dnssec": "Signed",
  "registeredOn": "Sun, 19 Sep 2021 15:18:19 GMT",
  "expiresOn": "Sat, 19 Sep 2026 15:18:19 GMT",
  "lastUpdated": "Wed, 11 Jun 2025 10:02:34 GMT",
  "statuses": [
    {
      "label": "Client transfer prohibited",
      "url": "https://icann.org/epp#clienttransferprohibited"
    },
    {
      "label": "Renew period",
      "url": "https://icann.org/epp#renewperiod"
    }
  ],
  "nameservers": ["lara.ns.cloudflare.com", "tony.ns.cloudflare.com"],
  "rdapServer": "https://pubapi.registry.google/rdap/"
}

📘 Response Fields

Field	Type	Description
domainName	string	The fully qualified domain name.
registrar	string	The domain registrar organization.
dnssec	string	DNSSEC status (e.g., "Signed", "Unsigned").
registeredOn	string (GMT)	Domain registration date.
expiresOn	string (GMT)	Domain expiration date.
lastUpdated	string (GMT)	Timestamp of the last known WHOIS update.
statuses	object[]	Array of EPP status objects (label + url).
nameservers	string[]	Array of authoritative nameservers.
rdapServer	string	The RDAP server used to retrieve this information.

📚 Specifications & Protocols

🌍 ICANN & IETF

• 📜 ICANN – What is RDAP?
• 📄 ICANN RDAP Replacement Announcement (Jan 2025)
• 🧾 EPP Status Code Definitions (ICANN)
• 📚 IETF RDAP Specs (RFC 7480–7484)

🧪 Test Clients & Tools

• 🌐 Client.RDAP.org (Official UI)
• 📦 RDAP Client GitHub Repo
• 🧪 ICANN RDAP Deployment Statistics
• 🛠️ ICANN RDAP Server Implementation (Reference)

🔗 Live Demo

Check it out: https://rdap.sayed.app

📄 License

This project is open-source and available under the MIT License