ChatGPT-Style Research Agent for n8n: GPT-4o + Wikipedia + Calculator

Ask research questions in n8n Chat—get GPT-4o answers with Wikipedia sources and exact calculations

Turn your n8n Chat experience into a ChatGPT-style research agent. This workflow uses an OpenAI-powered agent to look up facts on Wikipedia, perform arithmetic with a calculator tool, and return concise, sourced answers while preserving short-term conversation context.

What this workflow does

• Receives your question from the n8nn-nodes-langchainchat trigger when you send a message in n8n Chat.
• Routes the message to a GPT-4o chat agent configured as a concise research assistant.
• Maintains conversational continuity using Conversation Buffer Memory so the agent can reference recent messages.
• Performs factual lookups by querying Wikipedia and citing the relevant article in its response.
• Calculates when needed using the Calculator tool to return exact arithmetic results.
• Responds back in your language—the final answer is returned to the chat in the language of the user’s question.

Use cases

• Answer quick “what is / when did / who is” questions with Wikipedia-backed sources directly inside n8n Chat.
• Combine research and math (e.g., unit conversions, percentages, or multi-step calculations) with calculator-verified results.
• Support SaaS operations teams with an internal “research copilot” workflow that keeps context across short back-and-forth.
• Automation engineers prototype conversational assistants without building a custom UI—just use the n8n Chat interface.

Technical details

• OpenAI: GPT-4o (via n8nn8n-nodes-langchainlm chat open ai) using an agent configured through n8nn8n-nodes-langchainagent.
• Chat Trigger: n8nn8n-nodes-langchainchat trigger to start the workflow from n8n Chat.
• Tools: n8nn8n-nodes-langchaintool wikipedia for sourced lookups and n8nn8n-nodes-langchaintool calculator for arithmetic.
• Setup: Provide OpenAI API credentials for the GPT-4o mini chat model; optionally customize the agent’s system message for tone, language behavior, or tool-use instructions.