dns-cache

A local stdio MCP server that gives an assistant cached DNS, WHOIS, SSL and geo-IP lookup results for domains.

What you can do

This server exposes cached lookup data for domains, covering DNS records, WHOIS registration details, SSL certificate information and geo-IP data. It runs as a local stdio process, so the assistant calls it as a tool rather than reaching the internet directly. The README frames it as a cached oracle that saves the agent from doing these lookups itself, citing token spend, latency and rate-limit risk as the reason. The manifest does not list individual tool names.

When to use it

Worth adding when an assistant needs to check domain records, registration or certificate details repeatedly and you want cached results instead of repeated live lookups. It suits desktop agent setups such as Claude Desktop, Cursor, Cline, Continue or Windsurf.

Requirements

Node.js with npm, since it is installed from the npm package @weiseer/dns-cache-mcp and typically launched with npx. It runs locally over stdio and is desktop-only. Two optional environment variables exist: DNS_CACHE_URL to override the remote snapshot URL, and DNS_CACHE_LOCAL_ONLY to skip remote fetching. No authentication is declared.