Every Website Has a Secret Index — How to Use Sitemaps for Smarter Scraping

Every website has a sitemap.xml. It's a complete index of all pages the site wants search engines to find. For scraping, it's a roadmap. Finding the Sitemap https://example.com/sitemap.xml https://example.com/sitemap_index.xml https://example.com/robots.txt # Often lists sitemap URL Most sites follow these conventions. If not, check robots.txt — it usually contains a Sitemap: directive. What Sitemaps Contain <url> <loc> https://example.com/product/widget-pro </loc> <lastmod> 2026-03-20 </lastmod> <changefreq> weekly </changefreq> <priority> 0.8 </priority> </url> loc — every URL the site considers important lastmod — when the page was last updated priority — how important the site thinks each page is Why This Matters for Scrapers Complete URL discovery. Instead of crawling and guessing links, the sitemap tells you exactly which pages exist. Change detection. lastmod shows which pages changed recently. Only scrape updated pages = faster, cheaper runs. Content categorization. URL pattern