Extract & filter Reddit posts & comments with keyword search & markdown formatting

Reddit Posts & Comments Scraper

A powerful workflow to scrape Reddit posts and comments by keywords and/or subreddit, with intelligent filtering and formatting.

How it works

1. Search Reddit - Accepts keywords and/or subreddit parameters via webhook to search for relevant posts
2. Filter & Sort - Filters posts by date (last 60 days), minimum upvotes (20+), removes duplicates, and sorts by popularity
3. Extract Comments - For each post, retrieves and extracts the top 20 most upvoted comments with their reply threads
4. Format Results - Structures all posts and comments into a clean, readable markdown report
5. Return Data - Sends the formatted report back as a webhook response, ready for use in AI tools or other applications

Set up steps

Time to set up: ~10 minutes

1. Create Reddit App (5 minutes)

• Go to https://www.reddit.com/prefs/apps and create a new app
• Add your n8n URL and callback URL in the "redirect uri" field (you'll find this in the Reddit OAuth2 credentials setup in n8n)
• Copy your app's Client ID and Client Secret

2. Configure Reddit Credentials in n8n (2 minutes)

• In n8n, create new Reddit OAuth2 API credentials
• Paste your Client ID and Client Secret from step 1
• Complete the OAuth2 authentication flow

3. Update Webhook URLs (2 minutes)

• Update the webhook URLs in the example HTTP request nodes to match your n8n instance URL
• The workflow has two webhooks:
  • /webhook/reddit-search-keyword - for searching by keywords only
  • /webhook/reddit-search-subreddit - for searching within a specific subreddit

4. Customize Filters (1 minute - optional)

• Date filter: Line 6 in "Posted in Last x days" node (default: 60 days)
• Upvote filter: "Upvotes Requirement Filtering" node (default: 20+ upvotes)
• Post limit: "Limit" node (default: 10 posts)

5. Test the Workflow

• Use the example HTTP request nodes to test both search methods:
  • Keywords only: ?keywords=your,keywords,here
  • Subreddit search: ?keywords=your,keywords&subreddit=SubredditName

Usage Examples

Search by keywords:

GET https://your-n8n.com/webhook/reddit-search-keyword?keywords=AI,machine learning

Search within subreddit:

GET https://your-n8n.com/webhook/reddit-search-subreddit?keywords=ChatGPT,GPT-4&subreddit=OpenAI

The workflow returns a formatted text report with all posts, their metadata, and top comments ready for analysis or AI processing.