Subdomain API MCP Server: Install & Setup

Install Subdomain API in Claude Code

Claude Code

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

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

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

Frequently asked questions

What does the Subdomain API MCP server do?

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

Is the Subdomain API MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Subdomain API run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add Subdomain API to Claude Code?

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

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