Glossary · IndexNow
IndexNow
An open protocol, supported by Bing, Yandex and others, that lets a website notify search engines instantly when content changes — eliminating the wait for a crawl.
Full Definition
IndexNow is a simple HTTP-based protocol launched by Microsoft and Yandex in 2021
that lets publishers ping participating search engines the moment a URL is created
or updated. The publisher hosts a key file at the root of their domain, then POSTs
URLs to a single IndexNow endpoint; the engines re-crawl those URLs typically within
minutes.
IndexNow is not yet adopted by Google, but it is by Bing — which means content shows
up in Bing search, Microsoft Copilot, Yahoo, DuckDuckGo Instant Answers, and other
Bing-fed surfaces almost immediately. For high-stakes new content (a press release,
a crisis statement, a corrected biography) this can be the difference between hours
of stale results and instant updates.
Implementation is trivial: a key file in /public, an authenticated endpoint that
submits URLs, and (ideally) a deploy hook that calls the endpoint on every release.
In practice
- A company corrects an inaccurate biography page and pings IndexNow; Bing's crawler updates the result within 15 minutes, and Microsoft Copilot's answer to 'who is the CEO of X' reflects the correction by the next query.
- A crisis-response statement goes live on the company's newsroom; IndexNow ensures the statement is searchable on Bing within minutes, ahead of any hostile coverage being indexed.
Also known as
push indexing · instant indexing protocol
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