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 HTTP endpoint POST /api/tools/ip-blacklist-checker/execute. See the MCP 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 REST

POST https://api.findutils.com/api/tools/ip-blacklist-checker/execute · no API keys · 60 requests/min per IP

Execute — verified arguments

curl -X POST https://api.findutils.com/api/tools/ip-blacklist-checker/execute \
  -H "Content-Type: application/json" \
  -d '{
    "ip": "8.8.8.8"
  }'

Parameter schema for this endpoint

curl https://api.findutils.com/api/tools/ip-blacklist-checker

Interactive docs · OpenAPI 3.1 spec · All REST tools

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 an MCP tool

Claude, Cursor, and any MCP client can call this tool as findutils:ip_blacklist_checker after one connect command.

Connect once

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

Open the MCP reference for Ip Blacklist Checker →

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