Auto-Respond to Gmail Enquiries using GPT-4o, Dumpling AI & LangChain Agent

Who is this for? This workflow is perfect for customer support teams, sales departments, or solopreneurs who receive frequent email enquiries and want to automate the initial response process using AI. If you spend too much time answering similar questions, this system helps respond faster and more intelligently—without writing a single line of code. What problem is this workflow solving? Manually responding to repeated customer enquiries slows productivity and increases delay. This workflow classifies if an incoming email is a real enquiry, analyzes the content with a LangChain-powered agent, fetches helpful context using Dumpling AI, and sends a personalized reply using Gmail—all within mi

Help me set up the n8n workflow "Auto-Respond to Gmail Enquiries using GPT-4o, Dumpling AI & LangChain Agent" (https://n8n.io/workflows/4057). It uses: AI Agent, OpenAI Chat Model, Simple Memory, OpenAI, HTTP Request Tool. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.