BuiltWith MCP Server is an MCP server that integrates with BuiltWith's technology detection API to help AI assistants identify the technology stack behind any website. Acting as a bridge between AI assistants and the BuiltWith API, it accepts natural language queries about a site's technologies and returns human-friendly insights. When configured with a BuiltWith API key, the server performs domain lookups and retrieves data on frameworks, analytics tools, hosting providers, CMS, and other technology signals. The server formats the data for MCP-compatible assistants, enabling questions like 'What technologies is example.com using?' or 'Does netflix.com use Google Analytics?' The typical workflow is: user asks a question, the assistant forwards it to the BuiltWith MCP Server, the server calls the BuiltWith API, and the results are presented for decision-making or explanation. Installation involves cloning the repository, installing dependencies, and setting the BUILTWITH_API_KEY environment variable. Configuration shows wiring the server into an MCP config with the command and path to bw-mcp-v1.js. Documentation links point to BuiltWith API resources for deeper integration.