Bing IndexNow and AI answers: what it reaches and what it doesn't

This page covers the AI-answers side of IndexNow: which AI surfaces it can reach, what the evidence says, and how to pair it with Google. For the protocol itself (key files, endpoints, bulk submissions and response codes), see our IndexNow guide.

IndexNow in one paragraph

IndexNow is a free, open protocol that lets your site notify search engines when a URL is added, updated or deleted, instead of waiting for them to recrawl. You host a key file on your site to prove you control it, then send changed URLs to an endpoint, and the IndexNow FAQ says the submission is shared with all participating engines. As of October 2026, indexnow.org lists Microsoft Bing, Naver, Seznam.cz, Yandex and Yep, and the FAQ also lists an Amazon endpoint. Google is not on the list. The FAQ is clear that a submission "does not guarantee immediate indexing"; it increases "the likelihood that important changes are discovered and crawled faster." Setup, key rules and troubleshooting are in our IndexNow guide.

Which AI answers IndexNow can reach

IndexNow reaches AI answers only where the answer engine draws on the index of a participating search engine. In practice that means Bing, and through Bing, Microsoft's own AI surfaces.

If anyone tells you IndexNow "gets you into Google" or into every AI engine, the table above is the correction.

Why Bing's index matters for Copilot, and what's unknown about ChatGPT

Bing's index matters for AI answers because Copilot and Bing's AI summaries retrieve their sources from it. A page Bing hasn't crawled, or has only crawled in an old version, can't be cited in its current form by Copilot.

Copilot and Bing AI summaries. Microsoft's July 2025 webmaster guidance says "freshness signals directly influence how quickly updates are reflected in search results and AI generated answers," and it says to "use IndexNow for real-time URL submission." It also concedes that no tool can guarantee when or how content appears in AI-generated results (Bing Webmaster Blog).

ChatGPT search. When it launched ChatGPT search in October 2024, OpenAI said it "leverages third-party search providers, as well as content provided directly by our partners" (OpenAI). Microsoft announced in May 2023 that "Bing is coming to ChatGPT as the default search experience" (Microsoft). OpenAI hasn't said whether Bing is still one of its providers, and third-party estimates of how closely ChatGPT's citations track Bing's results conflict sharply. ChatGPT also needs its own crawler, OAI-SearchBot, to be allowed. Our ChatGPT SEO guide covers both, and where AI search gets its sources explains how each engine picks pages.

What the evidence says about IndexNow and AI citations

IndexNow and AI citations have been tested publicly only on Copilot, in a small, vendor-run test. Read it as direction, not proof.

• The only controlled test. In MaxAEO's test on one site, 40 pages submitted through IndexNow reached a first Copilot citation in a median of 9 days, against 31 days for 40 sitemap-only pages (MaxAEO). It's one site, one engine and one vendor, with no variance reported and no replication.
• Bing rank and Copilot citations. In the same vendor's July 2026 analysis of 38,412 Copilot answers (February to June 2026) for 612 B2B software and technology brands, 88% of Copilot-cited URLs ranked in Bing's top 20 for at least one related query.
• The Bing gap. The same analysis found that 17% of tracked brands had at least one commercially important page indexed in Google but missing from Bing. That's the gap IndexNow and a Bing Webmaster Tools sitemap are meant to close.

No public controlled test compares IndexNow with no IndexNow for ChatGPT, Perplexity or Google's AI features. Being crawled sooner makes your current version eligible sooner. Whether it's cited is still each engine's call, based on quality, authority and relevance.

Pair IndexNow with a Google push

Start with Google: its AI Overviews and AI Mode link only to pages in Google's index, and Google doesn't take part in IndexNow, so it needs its own step. Then add IndexNow for Bing and the other participating engines. Microsoft says Copilot's web answers use the Bing search service (Microsoft Learn). AI answers cite what's been crawled, and they lean toward pages that are kept current, so an update only one engine has seen is half done.

FreshlyCited can send both from one push. Its Google push checks which URLs Google already sees, doesn't send those (so no index credit is reserved for them), and pushes only the invisible ones. For sites you verify by hosting an IndexNow key file that FreshlyCited generates, it also submits the same URLs to IndexNow automatically, at no extra credit cost (you can switch this off per site). Only URLs on the verified host are submitted, because IndexNow requires host ownership; backlinks on other people's sites can't be sent this way. ChatGPT and Perplexity aren't part of either step: they use their own crawlers and search partners. We don't submit to them, and we don't claim to.

A workflow that covers both:

1. Make a real change. Update the facts, prices, steps or comparisons. A new date on an unchanged page isn't an update.
2. Update your sitemap lastmod using the real change time. Bing asks for "the true last modification time of the page content" (Bing Webmaster Blog).
3. Notify IndexNow for the changed URLs only, through your CMS, SEO plugin, CDN or FreshlyCited's automatic submission on a verified site.
4. Push the URL to Google. Use URL Inspection for a page or two; for many pages or client sites, you can push updated pages to Google (for pages Google already has, that's Refresh anyway, which uses 1 index credit with no credit back). Google says crawling "can take anywhere from a few days to a few weeks" (Google Search Central), and the Google side is covered in detail in how to submit a URL to Google.
5. Re-check both engines a few days later.

Measure the Bing side with the AI Performance report

The AI Performance report in Bing Webmaster Tools is the first-party way to see whether Bing-grounded AI answers cite your pages. Microsoft released it as a public preview on February 10, 2026. It shows how often your pages are cited across "Microsoft Copilot, AI-generated summaries in Bing, and select partner integrations," and lists a sample of the "grounding queries" used to retrieve them (Bing Webmaster Blog). It reports citations, not clicks.

To check a specific change:

• On Bing: use URL Inspection in Bing Webmaster Tools to confirm the page is indexed and when it was last crawled, then watch the AI Performance report over the following weeks.
• On Google: use URL Inspection in Search Console for pages you own, or a bulk index check for many URLs and for pages on sites you don't control.

FreshlyCited's visibility check covers the Google side (its index checks are Google only): it shows which pages and links are seen by Google and which are invisible, before and after each push. The AI search optimization guide covers the rest of the work. Check your own links free.