Track Relevant Reddit Posts with F5Bot
Monitor Reddit mentions via F5Bot emails, use AI to research context, classify relevance, and generate personalized responses for your product.
Last updated
November 17, 2025
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Key Takeaways
- Daily Reddit monitoring via F5Bot - The workflow checks Gmail every day at 8:30 AM for F5Bot email alerts about Reddit keyword mentions.
- AI-powered relevance filtering - An AI agent researches each Reddit post, reads comments, and classifies whether the post is actually relevant to your product.
- Authentic response drafting - For relevant posts, the AI generates a short, natural Reddit-style comment that references the user's actual problem.
- Slack delivery - Only relevant posts and their suggested responses are sent to a Slack channel for your team to review.
What This Workflow Does
This workflow fetches F5Bot email alerts from Gmail, uses an AI agent to research each mentioned Reddit post (including reading comments and searching the web), classifies whether the post is relevant to your product, generates a suggested response for relevant ones, and sends the results to a Slack channel. Irrelevant posts are filtered out before reaching Slack.
Use cases:
- Developer tool companies monitoring Reddit for discussions where their product is a natural fit
- Marketing teams looking for authentic community engagement opportunities on Reddit
- Founders who want to track when people discuss problems their product solves
How It Works
| Step | What Happens |
|---|---|
| 1. Scheduled Trigger | Runs daily at 8:30 AM (Europe/Berlin timezone) |
| 2. Gmail Find Email | Searches for F5Bot emails from the last 24 hours (from@f5bot.com newer_than:1d) |
| 3. Transform | Extracts the email results into individual items for processing |
| 4. AI Agent (Research and Classify) | For each alert, uses web search, Reddit search, and Reddit comment listing to research the post, classify relevance, and draft a response |
| 5. Filter | Keeps only posts where is_relevant is true |
| 6. Slack Send Message | Sends the post title, link, summary, relevance reason, and suggested comment to the #workflow-reddit-comments channel |
Workflow Nodes
| Node | Role |
|---|---|
| Scheduled Trigger | Fires the workflow daily at 8:30 AM |
| Gmail Find Email | Finds F5Bot alert emails from the past 24 hours (up to 10 results) |
| Transform | Flattens the email results into individual items |
| AI Agent (GPT-4.1) | Researches each Reddit post using search_web, Reddit search_post, and list_comments_in_a_post tools. Outputs post title, link, summary, relevance boolean, relevance reason, and suggested comment |
| Filter | Passes through only items where is_relevant === true |
| Slack Send Message | Posts the relevant findings to #workflow-reddit-comments with post details and a suggested response |
Setup Instructions
- Add the workflow template to Needle
- Create a free F5Bot account at https://f5bot.com and set up your keyword monitors
- Connect your Gmail account in the Find Email node
- Connect your Reddit account in the AI Agent node for the search_post and list_comments_in_a_post tools
- Connect your Slack account in the Send Message node and make sure the #workflow-reddit-comments channel exists
Customization
| What You Can Change | How |
|---|---|
| Schedule | Adjust the cron expression in the Scheduled Trigger (default: daily at 8:30 AM) |
| Email search window | Change the Gmail search query to look at a different time range (e.g., newer_than:2d) |
| Relevance criteria | Edit the AI Agent system prompt to define what counts as relevant for your specific product |
| Response tone | Modify the system prompt to adjust the style of suggested comments (casual, technical, founder perspective) |
| Notification channel | Change the Slack channel name in the Send Message node |
| Max emails processed | Adjust maxResults in the Gmail Find Email node (currently 10) |
FAQ
Q: What is F5Bot? A: F5Bot is a free service that monitors Reddit for specific keywords and sends you email alerts when those keywords appear in new posts or comments.
Q: Does this workflow post comments on Reddit automatically? A: No. It only drafts suggested comments and sends them to Slack. A team member reviews and decides whether to post.
Q: How does the AI decide if a post is relevant? A: The AI system prompt defines relevance criteria. By default, it looks for posts about AI agents, RAG systems, workflow automation, and related topics. Posts about generic sales, hiring, or unrelated topics are marked as not relevant.
Q: Can I add more keywords to track? A: Keywords are managed in your F5Bot account at https://f5bot.com, not in the workflow itself. Add or remove keywords there and the workflow will process whatever alerts F5Bot sends.
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