Custom N8N Reddit Agent to find and engage with posts and comments

Sub-Reddit Agent
I got cold dm’d on Reddit again last week from someone trying to sell me their Reddit Agent that would not only find me leads on Reddit but respond to them.
So I figured I may as well build this myself. Now this agent does NOT respond to anything but it does go out and find relevant posts and conversations in your chosen sub reddits.
I had already been using F5 Bot which is a great Free tool that lets you drop an email address and subscribe to notifications based on keywords. There are a few customization options but its pretty basic.
So I thought. What a perfect project for our Resources and Templates section of the site.
Turns out, it was a fun weekend project that actually works pretty well.
The concept is simple: monitor subreddits relevant to your business , use AI to analyse posts against your services, and get notified in Slack when there's a relevant conversation.
For our fictional Microsoft partner, we went with the MSP Subreddit where it picks up discussions about cloud migrations, security issues, and IT challenges - the stuff they actually help with.
The workflow has 7 steps:
• Monitor chosen subreddit
• Fetch new posts via Reddit API
• AI analysis against company profile
• Score relevance/priority
• Filter high-value opportunities
• Format notification
• Send to Slack/Teams
What I learned: N8N's AI nodes make this kind of automation surprisingly accessible. You don't need to be a developer - just need to understand your business and write decent prompts.
Is it perfect? No. But you can keep adding to it and tweaking it to make it perfect for you and your business.
I documented the whole build process and put the template on our site. Feel free to grab it, modify it, or just use it as inspiration for your own automation projects.
Sometimes the best tools are the ones you build yourself. 🛠️