Automate LinkedIn comment replies with GPT-3.5 & track in Google Sheets

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

How it works This workflow automates LinkedIn community engagement by monitoring post comments, filtering new ones, generating AI powered replies, and posting responses directly on LinkedIn. It als...

Best for

Multimodal AI automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.httprequest, n8n-nodes-base.set, n8n-nodes-base.if, @n8n/n8n-nodes-langchain.openai, n8n-nodes-base.stickynote, n8n-nodes-base.scheduletrigger, n8n-nodes-base.googlesheets

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Avkash Kakdiya.

Original n8n.io source

1.1 Workflow description

Title: Automate LinkedIn comment replies with GPT-3.5 & track in Google Sheets
Workflow name: Automate LinkedIn comment replies with GPT-3.5 & track in Google Sheets

How it works

This workflow automates LinkedIn community engagement by monitoring post comments, filtering new ones, generating AI-powered replies, and posting responses directly on LinkedIn. It also logs all interactions into Google Sheets for tracking and analytics.

Step-by-step

Trigger & Fetch

A Schedule Trigger runs the workflow every 10 minutes.
The workflow fetches the latest comments on a specific LinkedIn post using LinkedIn’s API with token-based authentication.

Filter for New Comments

Retrieves the timestamp of the last processed comment from Google Sheets.
Filters out previously handled comments, ensuring only fresh interactions are processed.

AI-Powered Reply Generation

Sends the new comment to OpenAI GPT-3.5 Turbo with a structured prompt.
AI generates a professional, concise, and engaging LinkedIn-appropriate reply (max 2–3 sentences).

Post Back to LinkedIn

Automatically posts the AI-generated reply under the original comment thread.
Maintains consistent formatting and actor identity.

Data Logging

Appends the original comment, AI response, and metadata into Google Sheets.
Enables tracking, review, and future engagement analysis.

Benefits

Saves time by automating LinkedIn comment replies.
Ensures responses are timely, professional, and on-brand.
Maintains authentic engagement without manual effort.
Prevents duplicate replies by filtering with timestamps.
Creates a structured log in Google Sheets for auditing and analytics.

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - 📥 Fetch LinkedIn Comments

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.1

Block 2 - 📊 Set Last Timestamp

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.3

Block 3 - 🔍 Filter New Comments

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2

Block 4 - 🤖 Generate AI Reply

Type / Role: @n8n/n8n-nodes-langchain.openAi - openAi
Config choices: Version 1

Block 5 - 💬 Post LinkedIn Reply

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.1

Block 6 - 📋 Workflow Notes2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 7 - ⏰ Runs Every 10 Mins

Type / Role: n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices: Version 1.2

Block 8 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 9 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 10 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 11 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 12 - 📊 Get Last Comment Timestamp

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.4

Block 13 - 💾 Store Comment Data

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.4

3. Summary Table

Workflow	Automate LinkedIn comment replies with GPT-3.5 & track in Google Sheets
Complexity	intermediate
Nodes	13
Categories	Multimodal AI
Author	Avkash Kakdiya
Published	25 Aug 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/7806/7806.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Multimodal AI workflows

Frequently asked questions

What does Automate LinkedIn comment replies with GPT-3.5 & track in Google Sheets do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Multimodal AI use case.

Avkash Kakdiya

115 workflows

Nodes

n8n-nodes-base.httprequest n8n-nodes-base.set n8n-nodes-base.if @n8n/n8n-nodes-langchain.openai n8n-nodes-base.stickynote n8n-nodes-base.scheduletrigger n8n-nodes-base.googlesheets

Complexity

intermediate

Published 25 Aug 2025

Likes 0

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Install path: /data/workflows/7806/7806.json

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Automate LinkedIn comment replies with GPT-3.5 & track in Google Sheets

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

How it works

Step-by-step

Benefits

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - 📥 Fetch LinkedIn Comments

Block 2 - 📊 Set Last Timestamp

Block 3 - 🔍 Filter New Comments

Block 4 - 🤖 Generate AI Reply

Block 5 - 💬 Post LinkedIn Reply

Block 6 - 📋 Workflow Notes2

Block 7 - ⏰ Runs Every 10 Mins

Block 8 - Sticky Note

Block 9 - Sticky Note1

Block 10 - Sticky Note2

Block 11 - Sticky Note3

Block 12 - 📊 Get Last Comment Timestamp

Block 13 - 💾 Store Comment Data

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions