This workflow contains community nodes that are only compatible with the self-hosted version of n8n. How it works This workflow is a simple AI Agent that connects to Langfuse so send tracing data to help monitor LLM interactions. The main idea is to create a custom LLM model that allows the configuration of callbacks, which are used by langchain to connect applications such Langfuse. This is achieves by using the "langchain code" node: - Connects a LLM model sub-node to obtain the model variable
Monitor AI chat interactions with Gemini 2.5 and Langfuse tracing is a ready-made n8n workflow you import as a workflow JSON file — no build required. It connects OpenAI, Gemini. It's free to download. Follow the 5-step import below to go live in minutes.

This workflow contains community nodes that are only compatible with the self-hosted version of n8n. How it works This workflow is a simple AI Agent that connects to Langfuse so send tracing data to help monitor LLM interactions. The main idea is to create a custom LLM model that allows the configuration of callbacks, which are used by langchain to connect applications such Langfuse. This is achieves by using the "langchain code" node: - Connects a LLM model sub-node to obtain the model variables (model name, temp and provider) - Creates a generic langchain initChatModel with the model parameters. - Return the LLM to be used by the AI Agent node. 📋 Prerequisites - Langfuse instance (cloud or self-hosted) with API credentials - LLM API key (Gemini, OpenAI, Anthropic, etc.) - n8n >= 1.98.0 (required for LangChain code node support in AI Agent) ⚙️ Setup 1. Add these to your n8n instance: Alternative: Configure these directly in the LangChain code node if you prefer not to use environment variables 2. Import the workflow JSON 3. Connect your preferred LLM model node 4. Send a test message to verify tracing appears in Langfuse
Download the workflow JSON file after purchase.
Open n8n → click the menu → Import from File.
Select the downloaded JSON and import.
Set up credentials for each node that requires them.
Click Execute Workflow to test, then activate.
Setup guide included
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