How do you add a Claude-powered chat to a Webflow site without exposing your API key?

Integrating a Claude chatbot into a Webflow site using one's API involves a production-ready method that eliminates the need for a separate backend, second domain, or CORS configuration by utilizing Webflow Cloud. This process involves creating a Next.js or Astro application under the existing Webflow domain, developing a server-side route to proxy Claude's API, and mounting the chat interface on a URL path like mysite.webflow.io/chat. Critical components for this setup include a Webflow site on a paid plan, an Anthropic API key, a GitHub account with Node.js 20+ installed, and basic React knowledge. The setup ensures the API key remains on the server, offering a secure and flexible conversational interface for visitors. The five-step process includes setting up the Webflow Cloud project, creating the server-side proxy route, building the React chat component, managing multi-turn conversation contexts, and deploying and mounting the chat. Key challenges and solutions are discussed, including environment variable errors, authentication issues with the Anthropic API, edge runtime errors, and maintaining conversation context. The guide aims to transition from a basic chat setup to a more valuable and contextually aware conversational tool for users on a Webflow site.