Prefix WhoIs MCP server

Prefix WhoIs is the official remote MCP server from pwhois.org. It answers at https://pwhois.org/mcp/ over streamable HTTP and asks you to sign in with your pwhois.org account before it lists its tools, so your client opens a login the first time it connects. Our probes reached it 5 of 5 times since 13 September 2026; the last check, on 23 October 2026, got the sign-in challenge, so it is up.

Live BGP routing table and registry lookups: IP origin, ASN prefixes, transit, org search.

Description as the publisher wrote it.

What Prefix WhoIs needs before it works

A sign-in. The server refused to list its tools to an anonymous client and answered with an authentication challenge, which is how an MCP server protected by OAuth behaves. Add it with one of the setups below; the first connection opens a login for your pwhois.org account, and the tools appear once you have approved it.

Add Prefix WhoIs to your AI client

Every block below points at https://pwhois.org/mcp/. Pick your client and copy.

claude mcp add --transport http prefix-whois https://pwhois.org/mcp/

{
  "mcpServers": {
    "prefix-whois": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://pwhois.org/mcp/"]
    }
  }
}

{
  "mcpServers": {
    "prefix-whois": {
      "url": "https://pwhois.org/mcp/"
    }
  }
}

{
  "servers": {
    "prefix-whois": {
      "type": "http",
      "url": "https://pwhois.org/mcp/"
    }
  }
}

{
  "context_servers": {
    "prefix-whois": {
      "url": "https://pwhois.org/mcp/"
    }
  }
}

{
  "mcpServers": {
    "prefix-whois": {
      "serverUrl": "https://pwhois.org/mcp/"
    }
  }
}

{
  "mcpServers": {
    "prefix-whois": {
      "url": "https://pwhois.org/mcp/"
    }
  }
}

name: Prefix WhoIs
version: 0.0.1
schema: v1
mcpServers:
  - name: Prefix WhoIs
    type: streamable-http
    url: https://pwhois.org/mcp/

{
  "mcpServers": {
    "prefix-whois": {
      "httpUrl": "https://pwhois.org/mcp/"
    }
  }
}

{
  "mcpServers": {
    "prefix-whois": {
      "type": "http",
      "url": "https://pwhois.org/mcp/"
    }
  }
}

{
  "mcpServers": {
    "prefix-whois": {
      "url": "https://pwhois.org/mcp/"
    }
  }
}

goose://extension?url=https%3A%2F%2Fpwhois.org%2Fmcp%2F&type=streamable_http&id=prefix-whois&name=Prefix%20WhoIs

Is Prefix WhoIs up right now?

It answered our last check on 23 October 2026 in 1061 ms. Over 5 checks since 13 September 2026 it answered 5. Status here comes from Neuronto's own probes, not from the publisher.

MCP servers similar to Prefix WhoIs

Questions about Prefix WhoIs

Is there an official Prefix WhoIs MCP server?

Yes. It is published by pwhois.org and served from pwhois.org, the vendor's own domain: https://pwhois.org/mcp/.

How do I sign in to Prefix WhoIs?

Add the server with a setup above. The first time your client connects it opens the sign-in page for pwhois.org; approve it and the tools load.

Is Prefix WhoIs down?

It answered our last check on 23 October 2026 in 1061 ms. Over 5 checks since 13 September 2026 it answered 5.

How do I add Prefix WhoIs to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://pwhois.org/mcp/. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does Prefix WhoIs need an API key?

It needs a sign-in rather than a key you paste: the server answered with an authentication challenge, so your client runs the login when it first connects.

Where this comes from

Publisher: org.pwhois. Endpoint host: pwhois.org. ARD identifier: urn:air:org.pwhois:mcp:pwhois. First indexed 13 September 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.