📱 Detect Reddit problems & auto-comment solutions with Google Gemini & Sheets
⚡ 228 views · 📱 Social Media & Email Marketing
Description
| N8N Workflow | AI Reddit Problem Detection & Auto-Solution Commenter 🤖
This n8n workflow automates Reddit community engagement by detecting posts that discuss problems and automatically replying with AI-generated solutions — powered by Google Gemini.
It’s designed for developers, automation creators, and brands who want to provide helpful, automated responses to Reddit users discussing issues in their niche.
How It Works
- The workflow starts with a Manual Trigger (When clicking ‘Execute workflow’).
- Search for a Post: It scans the r/n8n subreddit (or any subreddit you set) for recent posts containing the keyword “Why I stopped using”.
- Filter Posts (If Node): Filters posts that have 2 or more upvotes and non-empty text, ensuring only quality discussions are analyzed.
- Edit Fields: Extracts post details such as title, body text, upvotes, creation time, and subreddit ID for AI processing.
AI Agent + Google Gemini Chat Model:
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The first AI node analyzes the post and decides whether it’s describing a problem or frustration related to AI automation.
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Gemini responds with “Yes” or “No.”
Conditional Branch (If1 Node):
- If “Yes,” the post is confirmed as discussing a problem.
- The workflow then triggers the second AI Agent.
AI Agent 2 + Gemini:
- The second AI node uses Gemini to generate a helpful and concise solution addressing the issue mentioned in the Reddit post (for example, offering a fix, suggestion, or new idea).
Merge & Log Data:
- The AI’s findings (post details + solution) are merged and saved into a connected Google Sheet for tracking community insights.
Comment on Reddit:
- The workflow automatically posts the AI-generated solution as a comment reply on the original Reddit thread, engaging users directly.
How To Use
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Import the provided JSON workflow into your n8n dashboard.
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Set up the required credentials:
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Reddit OAuth2 API – for searching and posting comments.
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Google Gemini (PaLM) API – for AI text analysis and solution generation.
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Google Sheets API – for logging post data and AI results.
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Adjust the subreddit name, search keyword, or prompts to fit your niche.
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Click Execute Workflow to run the automation.
Requirements
- Reddit Developer Account (OAuth2 credentials).
- Google Gemini (PaLM) API account for AI processing.
- Google Sheets account for saving analysis results.
How To Customize
- Change the search keyword (e.g., “help with automation,” “issue with API,” etc.).
- Modify the AI prompts to tailor the solution style (technical, friendly, educational, etc.).
- Edit the Google Sheet fields to capture more or fewer details.
- Enable/disable the comment node if you want to manually approve replies before posting.
- Adjust the Gemini model name (e.g., models/gemini-2.0-flash) or parameters for faster or more creative responses.
🔗 Nodes Used
Google Sheets, Reddit, AI Agent, Google Gemini Chat Model
📥 Import
Download workflow.json and import into n8n:
Workflow menu → Import from File