Description
Turn your OpenAI Assistant into a power user — extend its capabilities with n8n-based tools that access custom data, run code, and respond in real-time
📉 Skip hardcoded answers — this workflow lets your Assistant use live tools to handle requests, fetch data, or perform logic using n8n
🧠 What Problem Does It Solve?
LLMs are powerful but limited without tools. This workflow solves that by connecting OpenAI’s Assistant with customizable n8n tools. You can now:
🔍 Query custom databases
⚙️ Run logic workflows on the fly
📅 Pull real-time values like date/time
📥 List or search structured knowledge sources
⚙️ How It Works
💬 Starts with a chat input trigger
🧠 Uses memory to keep track of the conversation
🛠️ Routes user intent to a matching tool workflow
🔁 Includes a “country capital” example tool with list + lookup logic
🕒 Has a custom tool that returns the current time
📡 Sends results back as Assistant replies instantly
✨ Key Features
🧩 Add unlimited tools with any logic, data, or APIs
🧠 GPT-4o acts as an intelligent router to choose the right tool
🛠️ Tool workflows can return JSON, strings, or complex outputs
🎯 Built-in logic for filtering, condition checks, and dynamic responses
📚 Includes a fictional country-capital demo that highlights tool flexibility
🔒 Easy to test, modify, and scale with custom prompt design
🧰 What You Need
✅ OpenAI Assistant with GPT-4o or GPT-4.1 access
✅ n8n v1.19.4 or later
✅ LangChain nodes enabled
✅ Optional: Custom data or logic in your sub-workflows
🚀 Setup Instructions
🔗 Connect the chat trigger node
🧠 Add memory and AI agent with proper system prompt
🛠️ Register each custom tool (e.g. country lookup) as a Tool Workflow
⚙️ Create logic in each sub-workflow for desired use-case
🧪 Test with simple queries like “What’s the capital of Gondor?” or “List countries”
🌐 Integrations
n8n LangChain
OpenAI GPT-4o
Custom JavaScript Tools
Structured JSON Tools
