Is the Subdomain API MCP server free to use?

Yes. Subdomain API is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Is the Subdomain API MCP server free to use?

Yes. Subdomain API is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Subdomain API

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

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

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Manual Client & Custom JSON ConfigExpand JSON ▾

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claude_desktop_config.json

{
  "mcpServers": {
    "subdomain-api": {
      "command": "npx",
      "args": [
        "-y",
        "https://subdomain.app"
      ]
    }
  }
}

💡 Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

Documentation Overview

Subdomain API is a 💻 Developer Tools MCP server listed on AllMCPs. Find known subdomains of a domain. Passive data; may include historic entries. List or count.

We couldn’t automatically pull a README for this listing from subdomain.app, so the summary above comes from its listing details. To install it, use the one-click buttons or copy the config from the Quick Install section above, then open the source repository for full setup instructions, configuration options, and the tools it exposes over MCP.

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Frequently Asked Questions about Subdomain API

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "subdomain-api": { "command": "npx", "args": ["-y", "Subdomain API"] } }

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Technical Specs & Signals

CategoryDeveloper Tools

42Quality signal: Fair · 42/100How this signal is calculated ▾

Server availability25/25

Verified ownership0/20

Documentation & tools16/30

Adoption & activity1/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

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More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Subdomain API →Install in Claude Desktop Install in Cursor Install in VS Code