Website SEO Audit, Broken Links & Change Monitor

I built this to check a website after a deploy, a redesign or a migration on the same domain. It crawls up to 5,000 pages. It reports broken links, redirect chains and loops, 4xx and 5xx pages, canonical and noindex problems, sitemap issues, mixed content and certificate problems. Each issue has the URL, the exact value that is wrong, and how to fix it. Run it again and it lists what changed since the last run: a page that now answers 404, a page that became noindex, a new redirect, a changed title or canonical. Each change is a row with the value before and after. For developers: - Start a run from the Apify API, for example as a step after a deploy, or from Make or n8n. - Read the results as JSON: a dataset of pages, one of issues and one of changes, plus summary.json with the health score, counts by severity and changes.changesTotal. - Run it from an AI agent through Apify's MCP server. - A link counts as broken only on 404, 410 or a domain that no longer exists. Links to other sites that answer 401, 403, 429 or LinkedIn's 999 keep their real status, are marked blocked-by-target, and are not counted as broken. Limits: it reads the HTML the server sends and does not run JavaScript, though it flags pages that seem to need it. Public pages only, up to 5,000 a run. Pricing: runs that check fewer than 10 pages are free. Larger sites are paid once per audit, and platform usage is included. On Apify's free plan an audit costs from $0.50 for up to 50 pages to $5.00 for up to 1,000. Paid Apify plans pay less, and an audit of over 1,000 pages needs one. Before the crawl starts, the run log shows the most the run can cost. It needs an Apify account; the free plan needs no credit card.