MCP SERVERPoint it at a URL and get SEO, security, performance and accessibility findings with a score and a fix list — no account, no crawler licence, one call.
LABSCO SUMMARY
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.
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 on MCPize is the alternative to self-hosting: it asks for an MCPize sign-in and is metered by audits per month, with a free tier of 100. MIT.
One command — pip install siteaudit-mcp
USE CASES
Run the combined audit for a score across all three areas, then open the category that scored worst for the itemised findings.
One call covers HTTPS, HSTS, CSP, X-Frame-Options, cookie flags and the SSL certificate's expiry, and says which are missing.
Every link on the page is requested and grouped by what came back, so 404s and timeouts are separated from ordinary redirects.
Get the Lighthouse scores with LCP, INP and CLS and the top opportunities, then confirm against response time, page size and caching headers.
Score both sites on the same SEO, security and performance checks and read back the specific areas where they are ahead.
Extract the JSON-LD and microdata on the page, validate it by type, and check that robots.txt is not blocking the pages you want indexed.
Run the WCAG checks for missing alt text, unlabelled form inputs, broken heading order and ARIA misuse, with a score to track against.
Counted once with only startup setup. Other versions, modes or optional credentials may expose a different list.
accessibility_auditRun WCAG accessibility checks on a URL.
Returns a score (0-100) and detailed findings on:
check_linksScan a page for broken links — find 404s, redirects, timeouts, and server errors.
Extracts all links (internal + external) from the page, checks each with a HEAD request, and groups results by status: working (2xx), redirects (3xx), client errors (4xx), server errors (5xx), and timeouts. Checks up to 50 links concurrently for speed. Results cached for 5 minutes.
check_robots_txtCheck and analyze a site's robots.txt file.
Shows which paths are allowed/disallowed, sitemaps referenced, and crawl-delay settings.
compare_sitesCompare SEO and performance scores of multiple websites side by side.
Useful for competitive analysis — see how your site stacks up against competitors across SEO, performance, and security.
competitor_gap_analysisAnalyze SEO/security/performance gaps vs competitors.
Returns areas where competitors outperform your site, with specific recommendations for improvement.
full_auditRun a comprehensive audit on a URL — SEO, performance, and security in one call.
Returns a unified score (0-100) plus detailed results for each category. This is the most complete analysis available.
lighthouse_auditRun Google Lighthouse via PageSpeed Insights API — get performance, accessibility, SEO, and best-practices scores plus Core Web Vitals (LCP, INP, CLS).
Returns Lighthouse scores (0-100), Core Web Vitals with ratings, and the top 5 performance optimization opportunities ranked by potential time savings. This uses Google's real Lighthouse engine — the same tool Chrome DevTools uses. Takes 15-30 seconds to complete.
performance_auditCheck page performance — response time, page size, compression, caching.
Returns server response time, page size, compression status, redirect chain analysis, and caching header review.
schema_validatorExtract and validate Schema.org structured data (JSON-LD, microdata).
Returns all structured data found on the page with validation hints and a breakdown by schema type. Critical for rich snippets in SERPs.
security_auditRun a security audit on a URL.
Checks HTTPS, HSTS, CSP, X-Frame-Options, cookie flags, SSL certificate validity and expiration, server disclosure, and other security headers. Returns score + fixes needed.
seo_auditRun an SEO-focused audit on a URL.
Checks title tags, meta descriptions, headings, images alt text, internal/external links, canonical URLs, Open Graph, structured data, mobile viewport, and content length. Returns score + actionable recommendations.
BEFORE YOU INSTALL
11 tools when we connected. accessibility_audit, competitor_gap_analysis and schema_validator are undocumented. On the hosted MCPize route, lighthouse_audit and compare_sites need a paid tier; self-hosting gives full access.
A client that can reach a remote MCP server over HTTP
CONTEXT COST
Rated by the size of the 11 tool definitions that ride along on every turn, not by how many there are
INSTALLATION
pip install siteaudit-mcphttps://siteaudit-mcp.mcpize.run/mcpAdd this hosted endpoint to your MCP client, then sign in.
{
"mcpServers": {
"siteaudit": {
"url": "https://siteaudit-mcp.mcpize.run/mcp"
}
}
}MCPize asks you to sign in with an MCPize account (OAuth) the first time a client connects; the free tier allows 100 audits a month. Running it yourself needs no account.
claude mcp add siteaudit -- uvx --from siteaudit-mcp siteaudit{
"mcpServers": {
"siteaudit": {
"command": "uvx",
"args": [
"--from",
"siteaudit-mcp",
"siteaudit"
]
}
}
}pip install siteaudit-mcp
siteauditgit clone https://github.com/vdalhambra/siteaudit-mcp.git
cd siteaudit-mcp
uv sync
uv run siteauditMCP servers
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