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

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Created by: Roshan Ramani || rawsun007

Roshan Ramani

Last update

Last update a day ago

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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