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

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