app.subdomain/subdomains

up checked 2026-11-11T09:38:45.078Z

Unclaimed · Unverified

Publisher-provided title

Subdomain API

Publisher-provided description

Find known subdomains of a domain. Passive data; may include historic entries. List or count.

Summary by lookupd

Lists or counts known subdomains of a domain using passive historical data, without active scanning.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http subdomains https://api.subdomain.app/mcp

Codex, remote (streamable-http)

codex mcp add subdomains --url https://api.subdomain.app/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "subdomains": {
      "url": "https://api.subdomain.app/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Publisher-provided text

find_subdomains List known subdomains (hostnames) of a root domain. Data is passive (not active scanning): results are historic observations and may include subdomains that no
count_subdomains Return only the total number of distinct subdomains known for a domain — no list. Cheap and low-token. Use when the user asks "how many subdomains" or you only

Shows this live status and links here; updates hourly.

[![lookupd status](https://lookupd.com/badge/app.subdomain/subdomains.svg)](https://lookupd.com/servers/app.subdomain/subdomains)