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🤖 Reddit Auto-Comment Assistant (AI-Driven Marketing Workflow)
Automate how you reply to Reddit posts using AI-generated, first-person comments that sound human, follow subreddit rules, and (optionally) promote your own links or products.
🧩 Overview
This workflow monitors Reddit mentions (via F5Bot Gmail alerts) and automatically:
- Fetches the relevant Reddit post.
- Checks the subreddit’s rules for self-promotion.
- Generates a comment using GPT-5 style prompting (human-like tone, <255 chars).
- Optionally promotes your chosen product from Google Sheets.
- Posts the comment automatically
It’s ideal for creators, marketers, or founders who want to grow awareness organically and authentically on Reddit — without sounding like a bot.
🧠 Workflow Diagram
🚀 Key Features
| Feature | Description |
|---|---|
| AI-Generated Reddit Replies | Uses GPT-powered reasoning and prompt structure that mimics a senior marketing pro typing casually. |
| Rule-Aware Posting | Reads subreddit rules and adapts tone — no promo where it’s not allowed. |
| Product Integration | Pulls product name + URL from your Google Sheet automatically. |
| Full Automation Loop | From Gmail → Gsheet → Reddit |
| Evaluation Metrics | Logs tool usage, link presence, and formatting to ensure output quality. |
🧰 Setup Guide
1️⃣ Prerequisites
| Tool | Purpose |
|---|---|
| n8n Cloud or Self-Host | Workflow automation environment |
| OpenAI API key | For comment generation |
| Reddit OAuth2 credentials | To post comments |
| Google Sheets API | To fetch and evaluate products |
| Gmail API | To read F5Bot alerts |
2️⃣ Import the Workflow
- Download
Reddit Assistant.json - In n8n, click Import Workflow → From File
- Paste your credentials in the corresponding nodes:
Reddit accountGmail accountGsheet accountOpenAI API
3️⃣ Connect Your Google Sheets
You’ll need two Google Sheets:
| Sheet | Purpose | Example Tab |
|---|---|---|
| Product List | Contains all your product names, URLs, goals, and CTAs | promo |
| Reddit Evaluations | Logs AI performance metrics and tool usage | reddit evaluations |
4️⃣ Set Up Gmail Trigger (F5Bot)
- Subscribe to F5Bot alerts for keywords like
"blog automation"or your brand name.
- Configure Gmail Trigger to only pull from sender:
[email protected].
5️⃣ Configure AI Agent Prompt
The built-in prompt follows a GPT-5-style structured reasoning chain:
- Reads the Reddit post + rules.
- Determines if promotion is allowed.
- Fetches product data from Google Sheets.
- Writes a short, human comment (<255 chars).
- Avoids buzzwords and fake enthusiasm.
📊 Workflow Evaluations
The workflow includes automatic evaluation nodes to track:
| Metric | Description |
|---|---|
contains link |
Checks if comment includes a URL |
contains dash |
Detects format breaks |
Tools Used |
Logs which AI tools were used in reasoning |
executionTime |
Monitors average latency |
💡 Why This Workflow Has Value
| Value | Explanation |
|---|---|
| Saves time | Automates Reddit marketing without manual engagement. |
| Feels human | AI comments use a fast-typing, casual tone (e.g., “u,” “ur,” “idk”). |
| Follows rules | Respects subreddits where promo is banned. |
| Data-driven | Logs performance across 10 test cases for validation. |
| Monetizable | Can promote Gumroad, YouTube, or SaaS products safely. |
⚙️ Example Use Case
“I used this automation to pull $1.4k by replying to Reddit posts about blog automation.
Each comment felt natural and directed users to my n8n workflow.”
