twitter.card-missing
No twitter:card meta tag is present.
What to change
Add <meta name="twitter:card" content="summary_large_image">; X/Twitter falls back to Open Graph for the other fields.
The documentation on developer.x.comA 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. Info is a best practice: worth doing, rarely urgent, and --no-info leaves it out. Each finding takes 1 point 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 twitter.card-missing
Or from an assistant, with the MCP tool seo_audit_page:
{
"url": "https://example.com",
"rules": [
"twitter.card-missing"
]
}
To leave it out of an audit, pass --disable twitter.card-missing on the command, or disableRules: ["twitter.card-missing"] to a tool.
More in Open Graph and Twitter cards
All 6 rules- Warning
og.missingNo Open Graph tags (og:title, og:description, og:image) are present. - Info
og.incompleteSome Open Graph tags are present but one or more of og:title, og:description, og:image, og:url, og:type is missing. - Warning
og.image-not-absoluteog:image is not an absolute URL. - Info
og.url-mismatchog:url differs from the canonical URL. - Warning
twitter.card-invalidtwitter:card has a value other than summary, summary_large_image, app or player.