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canonical.multiple

ErrorSEO audit

More than one canonical link is present. When they disagree, search engines ignore all of them.

What to change

Emit exactly one canonical link per page. Check for a framework default plus a hand-written one.

The documentation on developers.google.com

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. An error is a problem that keeps a page out of search or out of answers, or breaks how it shows there. Each finding takes 15 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 canonical.multiple

Or from an assistant, with the MCP tool seo_audit_page:

{
  "url": "https://example.com",
  "rules": [
    "canonical.multiple"
  ]
}

To leave it out of an audit, pass --disable canonical.multiple on the command, or disableRules: ["canonical.multiple"] to a tool.

All 8 rules