builtwith-api

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Introduction ​

builtwith-api provides typed access to the BuiltWith API through a library, CLI, and MCP server.

What is BuiltWith? ​

BuiltWith tracks the frameworks, analytics, CMS platforms, e-commerce tools, CDNs, and other technologies used by websites. Its API makes this data available to code.

Three ways to use it ​

Library ​

Import createClient and call any of the 13 methods. Zod validates each typed response.

ts
import { createClient } from "builtwith-api";

const client = createClient(process.env.BUILTWITH_API_KEY!);
const profile = await client.free("example.com");

CLI ​

Run lookups from your terminal. JSON output works with pipes and scripts.

bash
builtwith free example.com
builtwith domain example.com --onlyLiveTechnologies

MCP Server ​

Add BuiltWith tools to any MCP client.

json
{
  "mcpServers": {
    "builtwith": {
      "command": "npx",
      "args": ["-y", "builtwith-mcp"],
      "env": { "BUILTWITH_API_KEY": "your-key" }
    }
  }
}

Requirements ​