Decodo Scraper API Workflow Template (n8n Automation Amazon Book Purchase Report)

Watch the demo video below:

This workflow demos how to use Decodo Scraper API to crawl any public web page (headless JS, device emulation: mobile/desktop/tablet), extract structured product data from the returned HTML, generate a purchase-ready report , and automatically deliver it as a Google Doc + PDF to Slack/Drive.

Who’s it for

• Creators / Analysts who need quick product lists (books, gadgets, etc.) with prices/ratings.
• Ops & Marketing teams building weekly “top picks” reports.
• Engineers validating the Decodo Scraper API + LLM extraction pattern before scaling.

How it works / What it does

1. Trigger – Manually run the workflow.
2. Edit Fields (manual) – Provide inputs:
   • targetUrl (e.g., an Amazon category/search/listing page)
   • deviceType (desktop | mobile | tablet)
   • Optional: maxItems, notes, reportTitle, reportOwner
3. Scraper API Request (HTTP Request → POST)
   Calls Decodo Scraper API with:
   • URL to crawl, headless JS enabled
   • Device emulation (UA + viewport)
   • Optional waitFor / executeJS to ensure late-loading content is captured
4. HTML Response Parser (Code/Function or HTML node)
   Pulls the HTML string from Decodo response and normalizes it (strip scripts/styles, collapse whitespace).
5. Product Analyzer Agent (LLM + Structured Output Parser)
   Prompts an LLM to extract structured “book” objects from the HTML:
   The Structured Output Parser enforces a strict JSON schema and drops malformed items.
6. Build 📚 Book Purchase Report (Code/LLM)
   Converts the JSON array into a Markdown (or HTML) report with:
   • Executive summary (top picks, average price/rating)
   • Table of items (rank, title, author, price, rating, link)
   • “Recommended to buy” shortlist (rules configurable)
   • Notes / owner / timestamp
7. Configure Google Drive Folder (manual)
   Choose/create a Drive folder for output artifacts.
8. Create Document File (Google Docs API)
   Creates a Doc from the generated Markdown/HTML.
9. Convert Document to PDF (Google Drive export)
   Exports the Doc to PDF.
10. Upload report to Slack
    Sends the PDF (and/or Doc link) to a chosen Slack channel with a short summary.

How to set up

1 Prerequisites

• n8n (self-hosted or Cloud)
• Decodo Scraper API key
• OpenAI (or compatible) API key for the Analyzer Agent
• Google Drive/Docs credentials (OAuth2)
• Slack Bot/User token (files:write, chat:write)

2 Environment variables (recommended)

• DECODO_API_KEY
• OPENAI_API_KEY
• DRIVE_FOLDER_ID (optional default)
• SLACK_CHANNEL_ID

3 Nodes configuration (high level)

Edit Fields (Set node)
Scraper API Request (HTTP Request → POST)
HTML Response Parser (Code node)
Product Analyzer Agent
Build Book Purchase Report (Code/LLM)
Create Document File
Convert to PDF
Upload to Slack

Requirements

• Decodo : Active API key and endpoint access. Be mindful of concurrency/rate limits.
• Model : GPT-4o/4.1-mini or similar for reliable structured extraction.
• Google : OAuth client (Docs/Drive scopes). Ensure n8n can write to the target folder.
• Slack : Bot token with files:write + chat:write.

How to customize the workflow

• Target site : Change targetUrl to any public page (category, search, or listing).
  For other domains (not Amazon), tweak the LLM guidance (e.g., price/label patterns).
• Device emulation : Switch deviceType to mobile to fetch mobile-optimized markup (often simpler DOMs).
• Late-loading pages : Adjust waitFor.selector or use waitUntil: "networkidle" (if supported) to ensure full content loads.
• Client-side JS : Extend executeJS if you need to interact (scroll, click “next”, expand sections). You can also loop over pagination by iterating URLs.
• Extraction schema : Add fields (e.g., discount_percent, bestseller_badge, prime_eligible) and update the Structured Output schema accordingly.
• Filtering rules : Modify recommendation logic (e.g., min ratings count, price bands, languages).
• Report branding : Add logo, cover page, footer with company info; switch to HTML + inline CSS for richer Docs formatting.
• Destinations : Besides Slack & Drive, add Email, Notion, Confluence, or a database sink.
• Scheduling : Add a Cron trigger for weekly/monthly auto-reports.