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.

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🧩 Overview

This workflow monitors Reddit mentions (via F5Bot Gmail alerts) and automatically:

1. Fetches the relevant Reddit post.
2. Checks the subreddit’s rules for self-promotion.
3. Generates a comment using GPT-5 style prompting (human-like tone, <255 chars).
4. Optionally promotes your chosen product from Google Sheets.
5. 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.

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🧠 Workflow Diagram

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🚀 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.

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🧰 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

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2️⃣ Import the Workflow

1. Download Reddit Assistant.json
2. In n8n, click Import Workflow → From File
3. Paste your credentials in the corresponding nodes:
   • Reddit account
   • Gmail account
   • Gsheet account
   • OpenAI API

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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

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4️⃣ Set Up Gmail Trigger (F5Bot)

1. Subscribe to F5Bot alerts for keywords like "blog automation" or your brand name.

1. 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.

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📊 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

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💡 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.

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⚙️ 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.”