What tools does the subdomains MCP server provide?

subdomains exposes 2 tools: count_subdomains, find_subdomains. This list was returned by the running server when we connected to it.

Does subdomains require an API key?

No. subdomains answered a tools/list request without credentials.

How do I install subdomains?

Run: claude mcp add --transport http subdomains https://api.subdomain.app/mcp. One-click install links for Cursor and VS Code are also available on the server's page.

Connection check verified live · 20h ago

subdomains

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

Browser automation Databases & SQL Code & repositories

Install

Remote (HTTP)

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

Tools 2

GitHub stars —

Installs / wk —

Licence —

Transport streamable-http

Last checked 20h ago

Tools & capabilities

2 tools

Read from the running server on 20h ago.

count_subdomains read-only domain*

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 need the size of the…

find_subdomains read-only limitdomain*

List known subdomains (hostnames) of a root domain. Data is passive (not active scanning): results are historic observations and may include subdomains that no longer resolve or ar…