Monitoring competitor prices is a common practice in ecommerce, SaaS, and retail. Whether you're tracking a rival's product page or watching for price drops on a supplier's site, having accurate and timely data can directly impact your pricing decisions.
But most price monitoring setups fail and not in the way you'd expect. The real problem isn't usually getting blocked outright. It's that your monitoring quietly stops working without any warning. Your tool keeps running, reporting no changes, while the actual price has shifted multiple times. Continue reading in my blog.
Problem: Many website change monitors break silently when pages are JavaScript-heavy or when the DOM structure changes. FetchTheChange is my attempt to fix that. It monitors any value on a page (not just prices) and when a selector stops matching helps you recover instead of failing silently.
Key features:
Works on modern, JavaScript-heavy sites
Monitors any value (prices, availability, metrics, text, status messages)
Shows clear failure states (e.g. selector missing vs blocked )
Includes a built-in Fix Selector helper that suggests working selectors
FetchTheChange monitors any value on a page (not just prices) and—when a selector stops matching—helps you recover instead of failing silently.
Key features:
- Works on modern, JavaScript-heavy sites
- Monitors any value (prices, availability, metrics, text, status messages)
- Shows clear failure states (e.g. “selector missing” vs “blocked”)
Includes a built-in “Fix Selector” helper that suggests working selectors
