BuiltWith Technology Lookup

# BuiltWith > Find out what websites are built with. BuiltWith detects the technologies used on any website including CMS, ecommerce platforms, analytics, frameworks, hosting providers, and more. ## Start Here (For LLMs and AI Agents) Use the API-focused LLM guide first: - https://api.builtwith.com/llms.txt This file is a high-level product map. The API LLM guide above contains detailed endpoint usage. A full version of this product map is at https://builtwith.com/llms-full.txt and the full API reference is at https://api.builtwith.com/llms-full.txt. ## Core BuiltWith Links - Website lookup: `https://builtwith.com/[domain]` - Example: https://builtwith.com/example.org - Natural language Ask tool: https://builtwith.com/ask - Technology trends and market movement: https://trends.builtwith.com - MCP endpoint for AI integration: https://api.builtwith.com/mcp - API LLM guide (primary): https://api.builtwith.com/llms.txt ## Discovery Endpoints BuiltWith publishes the following `.well-known` resources for agents, API clients, and integration discovery: - Agent Skills Discovery index: https://builtwith.com/.well-known/agent-skills/index.json - BuiltWith API agent skill: https://builtwith.com/.well-known/agent-skills/builtwith-api/SKILL.md - MCP discovery manifest: https://builtwith.com/.well-known/mcp.json - Agent card: https://builtwith.com/.well-known/agent-card.json - API catalog: https://builtwith.com/.well-known/api-catalog - x402 v2 payment discovery: https://api.builtwith.com/.well-known/x402 - `https://builtwith.com/.well-known/x402` redirects to the canonical API-host descriptor. - OAuth authorization server metadata: https://builtwith.com/.well-known/oauth-authorization-server - OAuth protected resource metadata: https://builtwith.com/.well-known/oauth-protected-resource - OpenAI plugin/app manifest: https://builtwith.com/.well-known/openai.json - HTTP message signatures directory: https://builtwith.com/.well-known/