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RDAP API

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

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http rdap-api 'https://rdapapi.io/mcp/rdap' --header 'Authorization: <Bearer <your rdapapi.io API key>, created on your dashboard. Optional for clients that sign in with OAuth instead. Connecting and listing the tools works without it; every lookup requires a key or an OAuth sign-in.>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "rdap-api": {
            "type": "http",
            "url": "https://rdapapi.io/mcp/rdap",
            "headers": {
                "Authorization": "<Bearer <your rdapapi.io API key>, created on your dashboard. Optional for clients that sign in with OAuth instead. Connecting and listing the tools works without it; every lookup requires a key or an OAuth sign-in.>"
            }
        }
    }
}

Frequently asked questions

What is RDAP API?

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

How do I install RDAP API?

It runs as a remote server. In Claude Code: claude mcp add --transport http rdap-api 'https://rdapapi.io/mcp/rdap' --header 'Authorization: <Bearer <your rdapapi.io API key>, created on your dashboard. Optional for clients that sign in with OAuth instead. Connecting and listing the tools works without it; every lookup requires a key or an OAuth sign-in.>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does RDAP API need an API key?

Yes. It expects Authorization, which you set in its configuration.

Who maintains RDAP API?

It is published by io.rdapapi. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.