Google indexer: see which pages Google left out, and why

Usually a tool that sends URLs to Google hoping it indexes them faster. Google decides what to index; a tool can only make sure Google knows the page exists and that nothing on the page blocks it. Content Hub does the first and checks the second, then checks the result.

Not according to Google. Its documentation says the API “can only be used to crawl pages with either JobPosting or BroadcastEvent embedded in a VideoObject”, and abuse may get access revoked (Google). So on ordinary articles our Index button is outside Google's documented use: Google may ignore it, and it is only a best-effort nudge for a handful of URLs. That is also why it never runs in the publish pipeline or autopilot; it is only sent when you click Index, redirect a page or republish an off-line article from the Topical Map. For every article, Content Hub relies on your sitemap.

The reliable way is Search Console's URL Inspection, which reads Google's own record for that URL. A site: search is only a rough signal. Content Hub runs URL Inspection for you and keeps the result per page.

Google says crawling “can take anywhere from a few days to a few weeks” (Google). That is why our first check comes two days after publishing and the second around day 14.

No. IndexNow's own list of participating engines includes Bing, Yandex, Seznam, Naver and others, not Google (indexnow.org). For Google, Content Hub re-submits your sitemap through the Search Console API instead.

Google visited it and decided not to keep it for now. Google's Page Indexing help says it “may or may not be indexed in the future; no need to resubmit this URL for crawling” (Google). Google does not give a reason per page, so what you can do is improve it, make it clearly different from similar pages and link to it from pages that already get traffic.