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Build a Price Monitoring Bot with AI Web Scraping

Build a Price Monitoring Bot with AI Web Scraping

Author 1

Marco Vinciguerra

In the competitive world of e-commerce, price monitoring is no longer optional—it's essential. Whether you're a retailer trying to stay competitive or a consumer looking for the best deals, having real-time visibility into pricing across multiple platforms can make all the difference.

Why You Need a Price Monitoring Bot

Manual price checking is tedious and inefficient. Imagine trying to track prices for hundreds of products across Amazon, eBay, Walmart, and dozens of other retailers. A price monitoring bot automates this process, giving you:

  • Real-time alerts when prices drop or competitors change their pricing
  • Historical price data to identify trends and optimal buying times
  • Competitive intelligence to inform your pricing strategy
  • Inventory tracking to know when products go in or out of stock

How ScrapeGraphAI Powers Price Monitoring

Traditional web scrapers break constantly because e-commerce sites frequently update their layouts. ScrapeGraphAI's AI-powered approach understands the meaning of content, not just its structure. This means your price monitoring bot keeps working even when websites change.

Quick Start: Extract Prices from Any Product Page

from scrapegraph_py import Client
 
# Initialize the client with your API key
client = Client(api_key="your-api-key-here")
 
# SmartScraper request to extract pricing data
response = client.smartscraper(
    website_url="https://www.amazon.com/dp/B09V3KXJPB",
    user_prompt="Extract the product name, current price, original price, discount percentage, availability status, and seller name"
)
 
print("Result:", response)

Example Output:

{
  "product_name": "Apple AirPods Pro (2nd Generation)",
  "current_price": "$189.99",
  "original_price": "$249.00",
  "discount_percentage": "24%",
  "availability": "In Stock",
  "seller": "Amazon.com"
}

The AI understands what you're looking for and extracts it accurately, regardless of the page layout.

Search for Best Prices Across the Web

Use SearchScraper to find pricing across multiple retailers:

from scrapegraph_py import Client
 
# Initialize the client
client = Client(api_key="your-api-key-here")
 
# SearchScraper request to find best prices
response = client.searchscraper(
    user_prompt="Find the current prices for Sony WH-1000XM5 headphones from major retailers like Amazon, Best Buy, and Walmart",
    num_results=5
)
 
print("Result:", response)

Building a Complete Price Monitoring System

Step 1: Define Your Product List

Create a list of products you want to monitor:

products_to_monitor = [
    {"name": "iPhone 15 Pro", "urls": [
        "https://www.amazon.com/dp/B0EXAMPLE1",
        "https://www.ebay.com/itm/123456",
        "https://www.walmart.com/ip/123456"
    ]},
    {"name": "Sony WH-1000XM5", "urls": [
        "https://www.amazon.com/dp/B0EXAMPLE2",
        "https://www.bestbuy.com/product/123456"
    ]}
]

Step 2: Batch Price Extraction

from scrapegraph_py import Client
import json
from datetime import datetime
 
client = Client(api_key="your-api-key-here")
 
def monitor_prices(products):
    results = []
    
    for product in products:
        for url in product["urls"]:
            response = client.smartscraper(
                website_url=url,
                user_prompt="Extract current price, original price if on sale, availability, and shipping cost"
            )
            
            results.append({
                "product": product["name"],
                "url": url,
                "data": response,
                "timestamp": datetime.now().isoformat()
            })
    
    return results
 
# Run the monitor
price_data = monitor_prices(products_to_monitor)

Step 3: Set Up Price Alerts

def check_price_alerts(current_prices, target_prices):
    alerts = []
    
    for item in current_prices:
        product_name = item["product"]
        current_price = item["data"].get("current_price", 0)
        
        if product_name in target_prices:
            if current_price <= target_prices[product_name]:
                alerts.append({
                    "product": product_name,
                    "current_price": current_price,
                    "target_price": target_prices[product_name],
                    "url": item["url"]
                })
    
    return alerts
 
# Define your target prices
target_prices = {
    "iPhone 15 Pro": 999.00,
    "Sony WH-1000XM5": 299.00
}

Real-World Use Cases

E-commerce Retailers

Monitor competitor prices to adjust your own pricing strategy in real-time. Stay competitive without constantly checking rival websites.

Dropshippers

Track supplier prices across AliExpress, Alibaba, and wholesale platforms. Get alerts when your margins are at risk.

Deal Hunters

Build personal price trackers for products you want. Get notified the moment prices drop to your target.

Market Researchers

Collect pricing data across entire product categories. Analyze trends, seasonal patterns, and market dynamics. Learn more in our guide to building a market research dashboard.

Popular Platforms to Monitor

ScrapeGraphAI works seamlessly with all major e-commerce platforms:

  • Amazon - Product pages, search results, Best Sellers
  • eBay - Listings, auctions, Buy It Now prices
  • Walmart - Online prices, store availability
  • Target - Pricing, promotions, Circle deals
  • Best Buy - Tech prices, open-box deals
  • Shopify stores - Any store built on Shopify
  • Custom e-commerce - WooCommerce, Magento, and more

Best Practices for Price Monitoring

1. Respect Rate Limits

Don't hammer websites with requests. Space out your monitoring to be a good citizen of the web.

2. Store Historical Data

Keep a database of prices over time. This historical data is invaluable for trend analysis.

3. Handle Price Variations

Some sites show different prices based on location or user. Account for this in your monitoring logic.

4. Monitor Stock Status

Price drops mean nothing if the product is out of stock. Always track availability alongside pricing.

Get Started Today

Building a price monitoring bot with ScrapeGraphAI takes minutes, not weeks. Our AI handles the complexity of different website structures while you focus on what matters—making smart decisions based on pricing data.

Ready to start monitoring prices? Sign up for ScrapeGraphAI and build your first price monitoring bot today. Start with our free tier—no credit card required.

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