Bingbot
Microsoft · Answer index · robots.txt token bingbot
0.1% of 30,177 measured domains disallow bingbot in robots.txt at the site root. Separately, and independently of robots.txt, 17.4% of 30,185 reachable domains refuse an AI crawler user agent at the network edge on two consecutive probes from different locations - a refusal the site's own robots.txt does not declare and its owner often has not chosen.
Measured 2026-10-06 by direct request to every domain in the corpus. Method: how this is measured. Reuse under CC BY 4.0 with attribution.
Cite as: Crawl Census, "Bingbot blocking rate", measured 2026-10-06. https://crawlcensus.com/bot/bingbot
What it is definition
Indexes pages for Bing search and the Copilot answers that are grounded in the Bing index.
Bingbot is operated by Microsoft and classified here as answer index. These agents build the index an answer engine queries at question time. Disallowing one removes the site from those answers and from the citations that link back to it. Training is governed by separate tokens, so this is the expensive block, not the protective one.
Disallowing bingbot removes the site from the index Bing and Copilot queries when it answers a question. The engine can then neither quote nor link the page, which is a traffic decision rather than a licensing one. Model training is governed by separate tokens.
- robots.txt token
- bingbot
- Operator
- Microsoft
- Purpose
- Answer index
- Honors robots.txt
- yes
- Documentation
- https://www.bing.com/webmasters/help/which-crawlers-does-bing-use-8c184ec0
Identity on the wire exact string
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm) Chrome/116.0.1938.76 Safari/537.36curl -A 'Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm) Chrome/116.0.1938.76 Safari/537.36' https://example.com/Replace the host with your own. A 403, a challenge page or an empty body means the edge is blocking the agent whatever robots.txt says.
How to allow it, how to block it robots.txt
User-agent: bingbot
Allow: /Absent any rule, the agent is already allowed, so this group only matters when your * group disallows something. Naming the agent replaces the * group for it entirely, so repeat here every disallow you still want to apply to it.
User-agent: bingbot
Disallow: /Disallowing bingbot removes the site from the index Bing and Copilot queries when it answers a question. The engine can then neither quote nor link the page, which is a traffic decision rather than a licensing one. Model training is governed by separate tokens.
Sites that block it 54 shown
See every measured domain that blocks Bingbot
This list is served from a cache rebuilt just now. It is discarded the moment a rescan records a policy change for this agent, so a site that has just changed its robots.txt will drop off it within one scan rather than waiting for the cache to expire.
Compare Microsoft
Microsoft runs 2 agents in this registry, and they do different jobs. Blocking one says nothing about the others.
Common questions answered
Does blocking Bingbot remove me from Bing and Copilot?
Yes, in effect. Bingbot builds the index Bing and Copilot reads at question time, so disallowing it takes the site out of those answers and out of the citations that link back to it. This is the block that costs traffic.
How do I verify Bingbot requests are genuine?
Run a reverse DNS lookup on the source address. It must resolve to a host under search.msn.com, and a forward lookup of that host must return the same address. Bing Webmaster Tools exposes the same check, and Microsoft publishes its crawler ranges as JSON.
Check your own site free
See whether your robots.txt admits Bingbot today, and whether your edge agrees with it.