Automate Reddit Replies with F5Bot Alerts & GPT-5 Personalized Comments

🤖 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 account Gmail account Gsheet account OpenAI 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: admin@f5bot.com.

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.”