Subdomain API for Cursor

app.subdomain/subdomains

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

client:Cursor transport:streamable-http tools:2

Install Subdomain API in Cursor

~/.cursor/mcp.json · windows: %USERPROFILE%\.cursor\mcp.json

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

Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs