RDAP API for Claude.ai

io.rdapapi/rdap

Normalized JSON for any domain across 1,200+ TLDs, reading WHOIS where no RDAP server exists.

client:Claude.ai transport:streamable-http tools:7

Install RDAP API in Claude.ai

Settings → Connectors → Add custom connector

https://rdapapi.io/mcp/rdap

Claude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs

What Claude.ai can do once it is connected

domain-lookup
bulk-domain-lookup
ip-lookup
asn-lookup
nameserver-lookup
entity-lookup
tlds

RDAP API in other clients

Claude Code
Claude Desktop
Cursor
VS Code
Zed
Windsurf
Cline
Gemini CLI
Grok
ChatGPT
LangChain

RDAP API MCP server