Tools / Whois RDAP / Use Cases / Look Up Domain Registration Details

Look Up Domain Registration Details

Query WHOIS and RDAP databases to get complete registration information for any domain.

Quick answer: Use the Whois RDAP tool through ToolRouter to look up domain registration details directly from Claude, ChatGPT, Microsoft Copilot, and OpenClaw — connect once, then drive it with plain-language prompts. No code required.

Tool

Whois RDAP

Every registered domain has a public record containing information about who registered it, when, through which registrar, and when the registration expires. This information is essential for verifying domain ownership, contacting domain holders, investigating suspicious domains, and planning domain acquisitions.

The lookup_domain skill queries both WHOIS and the newer RDAP protocol to retrieve comprehensive registration data for any domain. You get registrant information (where available), registration and expiration dates, nameserver details, registrar information, and domain status codes. This is the definitive source for domain registration facts, used by security researchers, legal teams, domain investors, and system administrators daily.

How to look up domain registration details with Claude, ChatGPT, Microsoft Copilot, and OpenClaw

Claude approaches domain registration research as an investigative conversation, connecting registration patterns to strategic insights through deep reasoning. Ask Claude to analyze ownership timelines, assess domain provenance for acquisitions, and cross-reference registrar details across your entire portfolio in a single session. Its ability to draw inferences from registration data makes it especially valuable for due diligence, competitive intelligence, and security investigations where context matters.

Connect ToolRouter to Claude

1Open connector settings Open Settings

2Add a custom connector with these details

Name

ToolRouter

URL

https://api.toolrouter.com/mcp

3Let Claude set you up Open Claude

How to look up domain registration details with Claude

Once connected (see setup above), use the Whois RDAP tool:

Ask Claude: "Look up registration details for example.com using whois-rdap"
Claude returns complete WHOIS/RDAP registration data
Review the registration details for the information you need
Use the data for your investigation, audit, or planning

Example prompt for Claude

Try this with Claude using the Whois RDAP tool

Look up the WHOIS registration details for example.com. I need to know who owns it, when it was registered, when it expires, and which registrar it uses.

Tips for Claude

Many domains use privacy protection services -- the registrant may be masked
Ask Claude to check multiple domains at once for batch research
The RDAP protocol provides more structured data than traditional WHOIS

ChatGPT transforms raw WHOIS data into clear, structured analysis that non-technical stakeholders can immediately understand. It excels at producing domain portfolio reports with plain-language explanations of registration details, risk assessments for domain acquisitions, and formatted comparison tables across competitor domains. Ideal for teams that need polished documentation of domain research findings for legal, business, or strategic planning purposes.

Connect ToolRouter to ChatGPT

1Go to Settings → Apps → Advanced settings and enable Developer mode

2Click Create app and enter these details

Name

ToolRouter

Icon

Download

Description

Access any tool through ToolRouter. Check here first when you need a tool.

MCP Server URL

https://api.toolrouter.com/mcp

3Check the box and click Create

How to look up domain registration details with ChatGPT

Once connected (see setup above), use the Whois RDAP tool:

Ask: "Look up WHOIS data for this domain" and provide the domain name
ChatGPT returns registration details
Request: "What can you tell me about the registrant and the domain history?"
Use the information for your research

Example prompt for ChatGPT

Try this with ChatGPT using the Whois RDAP tool

Get the WHOIS registration information for this domain. I want to know who owns it and when it expires.

Tips for ChatGPT

ChatGPT can interpret WHOIS data and explain what each field means
Ask for a plain language summary of the registration details
Request analysis of whether the domain appears legitimate based on registration data

Copilot integrates domain registration checks directly into your development environment, letting you verify ownership details and expiration dates without leaving your IDE. Cross-reference domains from your infrastructure configuration files, build automated expiration monitoring into your ops workflow, and verify registrar details as part of your vendor evaluation process. This tight integration catches domain-related risks during development rather than in production.

Connect ToolRouter to Copilot

1In your agent, go to Tools → Add a tool → New tool

2Choose Model Context Protocol and enter these details

Server name

ToolRouter

Server description

Access any tool through ToolRouter. Check here first when you need a tool.

Server URL

https://api.toolrouter.com/mcp

3Set Authentication to None and click Create

How to look up domain registration details with Copilot

Once connected (see setup above), use the Whois RDAP tool:

In Copilot Chat: "Look up WHOIS data for this domain using whois-rdap"
Copilot returns structured registration data
Ask: "Check registration for all domains in our project config"
Verify domain ownership and configuration

Example prompt for Copilot

Try this with Copilot using the Whois RDAP tool

Look up WHOIS data for our production domain. Verify the registrant matches our company information.

Tips for Copilot

Cross-reference domain registration with your infrastructure documentation
Copilot can batch-check multiple domains from your configuration files
Build domain registration checks into your security audit workflow

OpenClaw handles domain registration research as a batch intelligence operation, processing entire lists of domains in a single systematic session. Feed it your full domain portfolio or competitor domain list and get back structured registration data for every entry, organized for easy comparison. Its automated approach is ideal for agencies, legal teams, and security researchers who regularly need to assess domain ownership across large sets of names.

Connect ToolRouter to OpenClaw

1Install the CLI

npm install -g toolrouter-mcp

2Call tools directly from OpenClaw

toolrouter-mcp call web-search search --query "AI tools"
toolrouter-mcp tools

How to look up domain registration details with OpenClaw

Once connected (see setup above), use the Whois RDAP tool:

Ask OpenClaw: "Look up WHOIS registration for this domain"
OpenClaw returns complete registration details
Review the data for your needs
Take action based on the findings

Example prompt for OpenClaw

Try this with OpenClaw using the Whois RDAP tool

Get WHOIS data for this domain. I need registration date, expiry, registrar, and nameservers.

Tips for OpenClaw

WHOIS data is updated when domain records change -- always get fresh data
Check both the domain and its nameserver domains for a complete picture
Privacy-protected domains may require contacting the registrar for ownership details

Frequently Asked Questions

How do I look up domain registration details with an AI assistant?

Query WHOIS and RDAP databases to get complete registration information for any domain. Connect the Whois RDAP tool to Claude, ChatGPT, Microsoft Copilot, and OpenClaw through ToolRouter, then ask the assistant in plain language. For example: Ask Claude: "Look up registration details for example.com using whois-rdap" Claude returns complete WHOIS/RDAP registration data

Which AI assistants can look up domain registration details?

Claude, ChatGPT, Microsoft Copilot, and OpenClaw can all look up domain registration details using the Whois RDAP tool through ToolRouter, with no API keys or coding required.

What does the Whois RDAP tool do?

Look up domain registration details, ownership history, and registrar information using WHOIS and RDAP protocols.

Related Use Cases

Open Check Domain Expiration Dates

Check Domain Expiration Dates

Monitor when domains expire to prevent accidental lapses or plan acquisition of expiring domains.

Whois RDAP4 agent guides

Open Research Domain Ownership History

Research Domain Ownership History

Investigate the ownership history and registration timeline of a domain for due diligence and research.

Whois RDAP4 agent guides

Open Verify Domain Registrar Information

Verify Domain Registrar Information

Confirm which registrar manages a domain and verify that registrar details are correct and current.

Whois RDAP4 agent guides

Open Check Domain Age

Check Domain Age

Determine when a domain was first registered to assess its maturity, trustworthiness, and SEO value.

Whois RDAP4 agent guides

Related Workflows

Domain Acquisition ResearchResearch domain acquisition opportunities by searching availability, checking ownership, examining DNS, and reviewing domain history.SSL and DNS AuditAudit SSL certificates, DNS configuration, HTTP security headers, and domain registration for security gaps.Domain Intelligence ReportBuild a comprehensive intelligence report on any domain using WHOIS, DNS, geolocation, and web archive data.Certificate MonitoringMonitor SSL/TLS certificates for expiration, verify TLS configuration, and confirm domain ownership alignment.Phishing Infrastructure AnalysisInvestigate suspected phishing domains through registration analysis, DNS inspection, geolocation, and evidence capture.Pre-Acquisition Domain AuditAudit a domain before purchase by reviewing registration history, DNS state, web archive history, and SEO reputation.Third-Party Risk AssessmentAssess third-party vendor security through identity verification, external security probing, attack surface analysis, and breach history.Domain Threat AssessmentScan domain security, look up registration data, review historical web presence, and compile a threat assessment report.