Yaron Been This workflow corresponds to n8n.io template #4580 — we link there as the canonical source.
This workflow follows the Agent → HTTP Request recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"id": "xc36kbxHODDBimC1",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "Youtube commentor",
"tags": [],
"nodes": [
{
"id": "6a95c116-f7c6-460a-97e6-1cefd90debf4",
"name": "Check for New Video",
"type": "n8n-nodes-base.manualTrigger",
"position": [
0,
0
],
"parameters": {},
"typeVersion": 1
},
{
"id": "2a280065-a28c-456a-abd9-9b0b1899f57f",
"name": "Set Channel ID",
"type": "n8n-nodes-base.set",
"position": [
220,
0
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "9fb80084-4cf7-474e-af18-5957daccbf01",
"name": "Channel 1 id",
"type": "string",
"value": "UC_x5XG1OV2P6uZZ5FSM9Ttw"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "5e8c588b-8d5d-4ccf-b9d3-e53374334d62",
"name": "Fetch Latest Video",
"type": "n8n-nodes-base.httpRequest",
"position": [
440,
0
],
"parameters": {
"url": "https://www.googleapis.com/youtube/v3/search",
"options": {},
"sendQuery": true,
"queryParameters": {
"parameters": [
{
"name": "key",
"value": "YOUR_API"
},
{
"name": "channelId",
"value": "={{ $json['Channel 1 id'] }}"
},
{
"name": "order",
"value": "date"
},
{
"name": "maxResults",
"value": "1"
},
{
"name": "part",
"value": "snippet"
},
{
"name": "type",
"value": "video"
}
]
}
},
"typeVersion": 4.2
},
{
"id": "65a0a3da-106a-4017-b5f8-d27751f1fdb7",
"name": "Commenter Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
760,
0
],
"parameters": {
"text": "=Title: {{ $json.items[0].snippet.title }}\nDescription: {{ $json.items[0].snippet.description }}",
"options": {
"systemMessage": "You are a Youtube commenter. Comment on youtube based on video description and title."
},
"promptType": "define"
},
"typeVersion": 1.9
},
{
"id": "15d6a657-dda7-4c71-b544-1789140072e4",
"name": "Comment Writer",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
720,
240
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {}
},
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "c42cdc20-0b52-4a70-bb60-9700fe5b2580",
"name": "Post Comment",
"type": "n8n-nodes-base.httpRequest",
"position": [
1200,
0
],
"parameters": {
"url": "https://www.googleapis.com/youtube/v3/commentThreads",
"method": "POST",
"options": {},
"jsonBody": "={\n \"snippet\": {\n \"videoId\": {{ $json.items[0].id.videoId }},\n \"topLevelComment\": {\n \"snippet\": {\n \"textOriginal\": {{ $json.output }}\n }\n }\n }\n}",
"sendBody": true,
"sendQuery": true,
"sendHeaders": true,
"specifyBody": "json",
"queryParameters": {
"parameters": [
{
"name": "part",
"value": "snippet"
}
]
},
"headerParameters": {
"parameters": [
{
"name": "Authorization",
"value": "Bearer YOUR_TOKEN_HERE Token"
}
]
}
},
"typeVersion": 4.2
},
{
"id": "bf05fe2a-d11e-49a4-a1b5-bc749b3fee5c",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-40,
-580
],
"parameters": {
"color": 5,
"width": 620,
"height": 780,
"content": "## \ud83d\udfe9 **Section 1: \ud83c\udfaf Video Discovery**\n\n### Nodes:\n\n* \ud83d\udd52 **Check for New Video** (Schedule Trigger)\n* \u270f\ufe0f **Set Channel ID** (Edit Fields)\n* \ud83c\udf10 **Fetch Latest Video** (HTTP Request)\n\n### \ud83d\udd0d Description:\n\nThis group handles **detecting and fetching the latest video** from a specific YouTube channel.\n\n* **\ud83d\udd52 Schedule Trigger** runs at regular intervals (e.g., every hour) to check for new content.\n* **\u270f\ufe0f Set Channel ID** allows you to manually configure or dynamically inject the channel ID to target.\n* **\ud83c\udf10 Fetch Latest Video** calls the YouTube Data API (GET request) to pull metadata about the most recent upload \u2014 primarily the video ID and description.\n\n> \ud83d\udca1 **Purpose**: Ensures you always get the freshest video from the target channel to react to.\n\n---\n\n"
},
"typeVersion": 1
},
{
"id": "b7c1a84c-9faf-4e95-bb95-928bf94a56fd",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
680,
-640
],
"parameters": {
"color": 2,
"width": 380,
"height": 1020,
"content": "## \ud83d\udfe8 **Section 2: \ud83e\udd16 Comment Creation**\n\n### Nodes:\n\n* \ud83e\udde0 **Generate Comment** (AI Agent)\n* \ud83e\uddfe **Comment Writer Model** (OpenAI Chat Model)\n\n### \u270d\ufe0f Description:\n\nThis is where the **magic happens** \u2014 the AI reads the video\u2019s description and writes a relevant, engaging comment.\n\n* **\ud83e\udde0 Generate Comment (AI Agent)** acts as the task coordinator. It uses the video description as context and issues a prompt to the OpenAI model.\n* **\ud83e\uddfe Comment Writer Model** is your **LLM** (like GPT-4 or GPT-3.5) that intelligently crafts a human-like, thoughtful comment that aligns with the content.\n\n> \ud83d\udca1 **Purpose**: Generate comments that feel organic, contextual, and engaging \u2014 potentially increasing visibility and interaction.\n\n---\n\n"
},
"typeVersion": 1
},
{
"id": "e903ead7-d85e-4ef9-84d7-bd069a5d2af9",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
1120,
-580
],
"parameters": {
"color": 3,
"width": 280,
"height": 780,
"content": "## \ud83d\udfe6 **Section 3: \ud83d\udce4 Comment Deployment**\n\n### Nodes:\n\n* \ud83d\udcec **Post Comment** (HTTP Request1)\n\n### \ud83d\ude80 Description:\n\nThis group is responsible for **publishing the AI-generated comment** directly on the video.\n\n* **\ud83d\udcec Post Comment** makes a POST request to the YouTube Data API, attaching the comment and video ID to publish it publicly.\n\n> \ud83d\udca1 **Purpose**: Automate the act of responding to fresh videos without human involvement.\n\n---\n\n"
},
"typeVersion": 1
},
{
"id": "5e2d1a7f-b405-44ec-817a-68c509bcc5b5",
"name": "Sticky Note9",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1540,
-580
],
"parameters": {
"color": 4,
"width": 1300,
"height": 320,
"content": "=======================================\n WORKFLOW ASSISTANCE\n=======================================\nFor any questions or support, please contact:\n Yaron@nofluff.online\n\nExplore more tips and tutorials here:\n - YouTube: https://www.youtube.com/@YaronBeen/videos\n - LinkedIn: https://www.linkedin.com/in/yaronbeen/\n=======================================\n"
},
"typeVersion": 1
},
{
"id": "63e86a55-daf1-4b64-a2e5-94e9526627dd",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1540,
-240
],
"parameters": {
"color": 4,
"width": 1289,
"height": 1838,
"content": "## \ud83d\udfe9 **Section 1: \ud83c\udfaf Video Discovery**\n\n### Nodes:\n\n* \ud83d\udd52 **Check for New Video** (Schedule Trigger)\n* \u270f\ufe0f **Set Channel ID** (Edit Fields)\n* \ud83c\udf10 **Fetch Latest Video** (HTTP Request)\n\n### \ud83d\udd0d Description:\n\nThis group handles **detecting and fetching the latest video** from a specific YouTube channel.\n\n* **\ud83d\udd52 Schedule Trigger** runs at regular intervals (e.g., every hour) to check for new content.\n* **\u270f\ufe0f Set Channel ID** allows you to manually configure or dynamically inject the channel ID to target.\n* **\ud83c\udf10 Fetch Latest Video** calls the YouTube Data API (GET request) to pull metadata about the most recent upload \u2014 primarily the video ID and description.\n\n> \ud83d\udca1 **Purpose**: Ensures you always get the freshest video from the target channel to react to.\n\n---\n\n## \ud83d\udfe8 **Section 2: \ud83e\udd16 Comment Creation**\n\n### Nodes:\n\n* \ud83e\udde0 **Generate Comment** (AI Agent)\n* \ud83e\uddfe **Comment Writer Model** (OpenAI Chat Model)\n\n### \u270d\ufe0f Description:\n\nThis is where the **magic happens** \u2014 the AI reads the video\u2019s description and writes a relevant, engaging comment.\n\n* **\ud83e\udde0 Generate Comment (AI Agent)** acts as the task coordinator. It uses the video description as context and issues a prompt to the OpenAI model.\n* **\ud83e\uddfe Comment Writer Model** is your **LLM** (like GPT-4 or GPT-3.5) that intelligently crafts a human-like, thoughtful comment that aligns with the content.\n\n> \ud83d\udca1 **Purpose**: Generate comments that feel organic, contextual, and engaging \u2014 potentially increasing visibility and interaction.\n\n---\n\n## \ud83d\udfe6 **Section 3: \ud83d\udce4 Comment Deployment**\n\n### Nodes:\n\n* \ud83d\udcec **Post Comment** (HTTP Request1)\n\n### \ud83d\ude80 Description:\n\nThis group is responsible for **publishing the AI-generated comment** directly on the video.\n\n* **\ud83d\udcec Post Comment** makes a POST request to the YouTube Data API, attaching the comment and video ID to publish it publicly.\n\n> \ud83d\udca1 **Purpose**: Automate the act of responding to fresh videos without human involvement.\n\n---\n\n## \ud83e\udde9 Optional Enhancements (Future Groups):\n\n* \ud83d\udce6 **Group: Logging & History**\n\n * Store each video ID + timestamp + posted comment in a DB (e.g., PostgreSQL or Google Sheets).\n* \ud83d\udd10 **Group: Authentication**\n\n * Manage OAuth2 token refreshing and storage for YouTube API access.\n\n---\n\n### \ud83d\udccc Summary Visual:\n\n```\n\ud83d\udfe9 Group 1: \ud83c\udfaf Video Discovery\n \u2514\u2500\u2500 \ud83d\udd52 Schedule \u2192 \u270f\ufe0f Channel ID \u2192 \ud83c\udf10 Fetch Video\n\n\ud83d\udfe8 Group 2: \ud83e\udd16 Comment Creation\n \u2514\u2500\u2500 \ud83e\udde0 AI Agent \u2192 \ud83e\uddfe OpenAI Model\n\n\ud83d\udfe6 Group 3: \ud83d\udce4 Comment Deployment\n \u2514\u2500\u2500 \ud83d\udcec Post Comment\n```\n\n\n"
},
"typeVersion": 1
}
],
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "507bae91-627c-44ae-89d5-0e05a607152e",
"connections": {
"Comment Writer": {
"ai_languageModel": [
[
{
"node": "Commenter Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Set Channel ID": {
"main": [
[
{
"node": "Fetch Latest Video",
"type": "main",
"index": 0
}
]
]
},
"Commenter Agent": {
"main": [
[
{
"node": "Post Comment",
"type": "main",
"index": 0
}
]
]
},
"Fetch Latest Video": {
"main": [
[
{
"node": "Commenter Agent",
"type": "main",
"index": 0
}
]
]
},
"Check for New Video": {
"main": [
[
{
"node": "Set Channel ID",
"type": "main",
"index": 0
}
]
]
}
}
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
openAiApi
Pro
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About this workflow
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: Discovers New Content: Monitors a specific YouTube…
Source: https://n8n.io/workflows/4580/ — original creator credit. Request a take-down →
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