n8n Claude Webhook Chatbot: Answer Website Service Questions

Turn website visitor questions into instant Claude-powered answers—via an n8n POST /chat webhook

This n8n automation workflow creates a browser-friendly AI chatbot endpoint that answers visitor questions about your services. It exposes a POST /chat webhook, uses Anthropic Claude (Haiku) to generate scoped responses, maintains short session-based memory, and returns a CORS-enabled JSON reply your frontend can embed.

What this workflow does

• Receives chat requests on the /chat webhook endpoint via a POST request with a JSON body.
• Validates input by extracting and trimming the incoming message; if it’s empty, the workflow errors.
• Assigns a sessionId (uses a provided sessionId or a default) so conversations can stay consistent across requests.
• Generates answers with Claude using Anthropic Claude (Haiku) and a system prompt that restricts responses to Ali İlhan’s defined services, projects, and tech stack.
• Maintains per-session memory with a buffer keyed by sessionId to preserve short conversational context.
• Returns a JSON response containing { reply, success, timestamp }, including CORS headers for frontend use.

Use cases

• Answer common questions on your website (services, projects, and tech stack) without manual support.
• Embed an AI chat widget that calls your n8n webhook and renders the returned reply.
• Support lead qualification by guiding visitors toward the right service topic with consistent, session-aware context.

Technical details

• Webhook trigger: Receives {"message":"...","sessionId":"..."} and responds to the original request.
• AI integration: n8nn8n-nodes-langchainagent + n8nn8n-nodes-langchainlm chat anthropic using Anthropic Claude (Haiku).
• Memory: Per-session memory buffer keyed by sessionId.
• Nodes used: code, webhook, sticky note, respond to webhook, and the LangChain Anthropic chat nodes.

Requirements: Anthropic API credentials.