Use any LangChain module in n8n (with the LangChain code node)
Needs changesNeeds changes. This template uses 1 thing(s) that n8n 3.0 removes: LangChain Code (legacy). 1 breaking item(s) found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 4 nodes and runs manually, when you click “Execute workflow”. Along the way it connects OpenAI Chat Model.
How it runs
Trigger: Manually, when you click “Execute workflow”.
- Set YouTube video ID (Edit Fields (Set)): sets 1 field: videoId
- LangChain Code: uses LangChain Code, with model: OpenAI Chat Model
Services it uses
Before you upgrade to n8n 3.0
1 thing in this workflow is removed in n8n 3.0. Fix it before you upgrade:
- LangChain Code (legacy) in LangChain Code: no direct replacement.
| Removed in 3.0 | Replace with |
|---|---|
| LangChain Code (legacy) LangChain Code | No direct replacement |
Nodes used (4)
- Manual Trigger
n8n-nodes-base.manualTrigger - LangChain Code
@n8n/n8n-nodes-langchain.code - Edit Fields (Set)
n8n-nodes-base.set - OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi
From the author
LangChain is a framework for building AI functionality that users large language models. By leveraging the functionality of LangChain, you can write even more powerful workflows. This workflow shows how you can write LangChain code within n8n, including…