Monitor viral Reddit posts and send GPT-4o-mini summaries to Telegram

Description

Who's it for

This workflow is perfect for:

Content creators who need to stay on top of trending topics
Marketers tracking industry discussions and competitor mentions
Community managers monitoring relevant subreddits
Researchers gathering trending content in specific niches
Anyone who wants curated Reddit updates without manual browsing

What it does

This automated workflow:

Monitors multiple subreddits for viral posts daily
Filters posts based on engagement metrics (upvotes and recency)
Generates concise AI summaries of trending content
Delivers formatted updates directly to your Telegram chat
Runs completely hands-free once configured

How it works

Step 1: Configuration & Scheduling
Triggers daily at 8 AM (customizable)
Loads your configured subreddit niches and Telegram settings

Step 2: Data Collection
Loops through each subreddit in your niche list
Fetches the 50 newest posts from each subreddit
Extracts key data: title, URL, upvotes, timestamp, subreddit name

Step 3: Smart Filtering
Applies viral post criteria:
Posts with 500+ upvotes, OR
Posts with 70+ upvotes created within the last 24 hours
Ensures only high-engagement content passes through

Step 4: AI Summarization
Aggregates all filtered posts into a single batch
Sends to GPT-4o-mini for analysis
Generates concise 100-200 word summaries
Formats output for Telegram markdown

Step 5: Delivery
Sends all summaries to your Telegram chat
Includes post links and engagement metrics
Delivers in a clean, readable format

Setup steps

1. Configure Reddit credentials
Connect your Reddit OAuth2 API credentials in the "Get Reddit Viral Posts" node
Ensure you have API access enabled on your Reddit account

2. Configure Telegram credentials
Add your Telegram bot token in the "Send to Telegram" node
Get your chat ID by messaging your bot and checking updates

3. Customize your niches
Open the "Workflow Configuration" node
Edit the niches array with your target subreddits
Default niches: technology, programming, science, gaming

4. Set your Telegram chat ID
Replace the default chat ID (7917193308) in "Workflow Configuration"
Use your personal chat ID or group chat ID

5. Adjust the schedule (optional)
Modify the "Daily 8 AM Trigger" to your preferred time
Change frequency if you want multiple updates per day

6. Test before activating
Run the workflow manually using the "Test workflow" button
Verify summaries arrive in Telegram correctly
Check that filtering logic works as expected

Requirements

Required credentials:
Reddit OAuth2 API access (free)
Telegram bot token (free via @BotFather)
OpenAI API key for GPT-4o-mini (paid)

Platform requirements:
n8n instance (self-hosted or n8n Cloud)
Active internet connection
Sufficient API rate limits for your usage

Technical knowledge:
Basic understanding of n8n workflows
Ability to generate API credentials
Familiarity with Telegram bots (helpful but not required)

How to customize

Adjust subreddit monitoring:
Add or remove subreddits in the niches array
Format: ["subreddit1", "subreddit2", "subreddit3"]
Example: ["machinelearning", "datascience", "artificial"]

Modify viral post criteria:
Edit the "Filter" node conditions
Change upvote thresholds (default: 500+ or 70+ within 24h)
Adjust time window for recency checks

Customize AI summaries:
Update the system prompt in "AI Summarizer" node
Change summary length (default: 100-200 words)
Modify tone, style, or focus areas
Switch to different OpenAI models if needed

Change scheduling:
Modify trigger time in "Daily 8 AM Trigger"
Options: hourly, twice daily, weekly, custom cron
Consider API rate limits when increasing frequency

Adjust data collection:
Change the limit parameter in "Get Reddit Viral Posts"
Default: 50 posts per subreddit
Higher limits = more comprehensive but slower execution

Enhance filtering logic:
Add additional criteria (comments count, awards, etc.)
Create category-specific thresholds
Filter by post type (text, link, image)

Format Telegram output:
Modify parse_mode in "Send to Telegram" node
Options: Markdown, HTML, or plain text
Customize message structure and styling