Chatbot with any LLM and conversation memory

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# Chat with any LLM via OpenRouter and conversation memory in n8n

This template enables a fully configurable chat interface with any language model through OpenRouter, supporting dynamic model selection and persistent conversation context. Ideal for rapid LLM testing, building adaptive chatbots, or creating AI assistants with full dialogue history.

## Who it´s for
- Developers testing multiple LLMs via a single interface
- Product teams needing to switch AI models quickly
- Automation builders creating context-aware chatbots
- AI researchers experimenting with open-source models

## What the automation does
- Triggers on incoming chat messages
- Routes the message to a selected LLM via OpenRouter
- Uses a LangChain agent with windowed memory to maintain context by sessionId
- Dynamically sets model, prompt, and session without altering workflow structure
- Returns the model’s response back to the chat
- Allows switching models (e.g., from DeepSeek to Gemini) by changing just one node parameter

## What´s included
- Ready-to-use n8n workflow
- Trigger and handler logic for chat interactions
- Integrations with OpenRouter and custom LLM APIs
- Basic text instructions for setup and adaptation

## Requirements for setup
- n8n instance (cloud or self-hosted)
- OpenRouter API key
- Access to any LLM available via OpenRouter
- Message input source (chat, webhook, frontend interface)

## Benefits and outcomes
- Unified interface for multiple LLMs
- Persistent conversation context across messages
- Minimal effort to switch between models
- Full control over prompts and generation settings
- Reusable foundation for AI support agents or assistants
- Reduced reconfiguration time when changing models

## Important: template only
Important: you are purchasing a ready-made automation workflow template only. Rollout into your infrastructure, connecting specific accounts and services, 1:1 setup help, custom adjustments for non-standard stacks and any consulting support are provided as a separate paid service at an individual rate. To discuss custom work or 1:1 help, contact via chat