Subdomain API for VS Code

app.subdomain/subdomains

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

client:VS Code transport:streamable-http tools:2

Install Subdomain API in VS Code

.vscode/mcp.json

{
  "servers": {
    "subdomains": {
      "type": "http",
      "url": "https://api.subdomain.app/mcp"
    }
  }
}

Requires agent mode. MCP: Open User Configuration puts the same block in every workspace. VS Code docs