Subdomain Finder MCP MCP

v1.0.0

io.github.theluckystrike/subdomain-finder-mcp

Passive subdomain enumeration from certificate transparency (certspotter, crt.sh) with DNS checks.

transport:streamable-http tools:4

Target client

run in your project directory

claude mcp add --transport http subdomain-finder-mcp https://subdomain-finder-mcp.lipmichal.workers.dev/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs


                find_subdomains

Read-only

find subdomains


                resolve_subdomains

Read-only

resolve subdomains


                get_certificate_history

Read-only

get certificate history


                summarize_attack_surface

summarize attack surface

All 4 tools, one page each

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.