The value is in the ordering: run the combined audit to get a score across SEO, performance and security, then go into the single-category tool for whichever number came back worst, since that is where the specific findings and fixes live. The competitor comparison is the part that is hard to get elsewhere — it scores your page and theirs on the same checks and returns the differences, rather than leaving you to line up two reports.
A website auditor that runs from the conversation. Each tool takes a URL and returns a score out of 100 plus the specific findings behind it, so the output is a list of things to change rather than a dashboard to interpret.
- A combined audit covering SEO, performance and security in one call with a unified score, or each of the three on its own
- SEO detail: title tags, meta descriptions, heading structure, image alt text, internal and external links, canonical URLs, Open Graph, structured data, mobile viewport and content length
- Security detail: HTTPS, HSTS, CSP, X-Frame-Options, cookie flags, SSL certificate validity and expiry, and what the server discloses about itself
- Performance detail: server response time, page size, compression, the redirect chain and caching headers
- Google Lighthouse through PageSpeed Insights — performance, accessibility, SEO and best-practices scores with Core Web Vitals (LCP, INP, CLS) and the top optimisation opportunities
- WCAG accessibility checks: missing alt text, form inputs without labels, heading hierarchy, ARIA usage and language declaration
- Every link on the page checked with a HEAD request and grouped by status — working, redirected, client error, server error, timed out
- robots.txt parsed into what is allowed and disallowed, the sitemaps it references and any crawl-delay
- Schema.org structured data extracted and validated, broken down by type
- Several sites scored side by side, and a gap analysis that names where competitors beat you and what to change
No account and no API key when you run it yourself. Python 3.11 or newer, started over stdio as uvx --from siteaudit-mcp siteaudit, or pip install siteaudit-mcp. The Lighthouse tool goes through Google's PageSpeed Insights API, so it is the one call bounded by Google's quota rather than by anything local. A hosted endpoint exists as an alternative to self-hosting, metered by audits per month with a free tier of 100. MIT.
One command — pip install siteaudit-mcp