Ip Blacklist Checker

Network REST API MCP network tool

Return whether an IPv4 address is listed on 12 well-known DNS blacklists (Spamhaus, Barracuda, SpamCop, SORBS, UCEPROTECT, PSBL and more), with listed, clean and failed counts. Lookups use Google DNS-over-HTTPS.

This page documents the MCP tool findutils:ip_blacklist_checker. See the REST reference →

This tool fetches a fixed, hard-coded public upstream — never a private host. Results depend on that upstream.

Use in the browser View as Markdown

Call it over MCP

Tool name findutils:ip_blacklist_checker · no API keys · 120 requests/min per IP

Claude Code

claude mcp add findutils --transport http https://mcp.findutils.com/

Claude Desktop — claude_desktop_config.json

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}

Raw JSON-RPC (any MCP client) — verified example

curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "ip_blacklist_checker",
      "arguments": {
        "ip": "8.8.8.8"
      }
    }
  }'

Input schema

Argument	Type	Required	Description
ip	string	yes	Public IPv4 address to check, e.g. "203.0.113.5". DNSBLs only support IPv4.

Example arguments (verified)

{
  "ip": "8.8.8.8"
}

Also a REST endpoint

The same tool answers plain HTTP at POST /api/tools/ip-blacklist-checker/execute — no key, 60 requests/min.

Open the REST reference for Ip Blacklist Checker →

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