Generate contextual YouTube comments automatically with GPT-4o
Needs changesNeeds changes. This template uses 1 thing(s) that n8n 3.0 removes: AI Agent v1 (old agent modes). 1 breaking item(s) found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 6 nodes and runs manually, when you click “Execute workflow”. Along the way it connects OpenAI Chat Model. It also calls googleapis.com over HTTP.
How it runs
Trigger: Manually, when you click “Execute workflow”.
- Set Channel ID (Edit Fields (Set)): sets 1 field: Channel 1 id
- Fetch Latest Video (HTTP Request): calls googleapis.com
- Commenter Agent (AI Agent): runs an AI agent, with model: Comment Writer
- Post Comment (HTTP Request): calls googleapis.com (POST)
Services it uses
HTTP calls to: googleapis.com
Before you upgrade to n8n 3.0
1 thing in this workflow is removed in n8n 3.0. Fix it before you upgrade:
- AI Agent v1 (old agent modes) in Commenter Agent (v1.9): replace with Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent.
Rather not rewrite it? Many of these flows can be rebuilt in Make (free plan).
| Removed in 3.0 | Replace with |
|---|---|
| AI Agent v1 (old agent modes) Commenter Agent (v1.9) | Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent. |
Nodes used (5)
- Manual Trigger
n8n-nodes-base.manualTrigger - Edit Fields (Set)
n8n-nodes-base.set - HTTP Request
n8n-nodes-base.httpRequest - AI Agent
@n8n/n8n-nodes-langchain.agent - OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi
From the author
Workflow Overview This cutting-edge n8n workflow is a powerful automation tool designed to revolutionize how content creators and marketers engage with YouTube channels. By leveraging AI and the YouTube Data API, this workflow automatically: 1. Discovers New…