response.not-html

What to change

A finding of this rule on a page carries the exact edits for that page: the markup it quotes, and what to write instead.

When it runs

Runs on every SEO audit: of a page, a crawl, a build directory or HTML. A warning is a problem that costs a page ranking, clicks or citations. Each finding takes 5 points off the page's score.

The severity here is the rule's usual one: a finding can be raised or lowered when the page gives a reason.

Run it, or skip it

Check a page for this rule alone, after a fix for instance:

npx @rivi-software/agentic-seo-check audit https://example.com --rule response.not-html

Or from an assistant, with the MCP tool seo_audit_page:

{
  "url": "https://example.com",
  "rules": [
    "response.not-html"
  ]
}

To leave it out of an audit, pass --disable response.not-html on the command, or disableRules: ["response.not-html"] to a tool.

• Errorresponse.error-statusThe URL returned a 4xx or 5xx status code.
• Inforesponse.redirectedThe requested URL redirected to another URL.
• Warningresponse.redirect-chainThe URL goes through two or more redirects before reaching the final page.
• Warningresponse.slowThe HTML response took longer than the configured threshold (default 2000 ms).
• Inforesponse.truncatedThe page is larger than the audit reads (5 MB; 2 MB on the hosted server), so only its first part was audited.
• Warningresponse.not-httpsThe final URL is served over plain http.