msnbot
msnbot is a search-engine crawler operated by Microsoft. Its job is to find, fetch, and index web pages so they can be returned in organic search results.
Traffic is regular and bounded by your robots.txt. Allowing it is generally how your site stays discoverable through the corresponding search engine, blocking it almost always reduces visibility there.
For most sites, search-engine crawlers are still the largest source of bot traffic and the largest source of human visitors that follow.
See msnbot on your own site
Match the User-Agent header on incoming requests against the pattern below.
regex
For higher confidence, also verify the source IP against the operator's published ranges. UA strings can be spoofed; IP ownership is harder to fake.
Renders JavaScript
No
IP verification
Published IP ranges
Crawl frequency
Continuous
Honors robots.txt
Yes
Honors Crawl-delay
Yes
Microsoft runs 24 bots in total. Each one is a separate user-agent so you can allow or block them independently.
Link Unfurler
11Search Engine
4- Bingbot
- MSN
- msnbotYou are here
- msnbot-media
AI Search Index
2Agentic Browser
2DevOps & Monitoring
1Generic Crawler
1SEO Crawler
1Should I let msnbot through?
In most cases, yes. Blocking traditional search crawlers reduces organic-search visibility. Allowing is the default for almost all sites. If volume gets noisy, rate-limit it before you block it outright.
Does blocking msnbot affect my Google rankings?
Only on Microsoft msnbot feeds. Each search engine runs its own crawler, so blocking msnbot only removes you from that one index. Your visibility on Google, Bing, or anything else is untouched.
How do I confirm a request is really from msnbot?
Look at the User-Agent header in your access logs and match it against the strings listed above. Worth knowing that the User-Agent is easy to fake, so this check tells you "the traffic claims to be msnbot", not "the traffic is genuinely msnbot". If you need stronger guarantees, look for a reverse-DNS check or wait for Microsoft to publish IP ranges.
What happens to my traffic if I block msnbot?
Your pages drop out of Microsoft's index, which means losing the organic share you get from that engine. Not catastrophic if Microsoft is a minor player, much more painful if it's a meaningful source of your traffic. Check your analytics for Microsoft's actual referral share before deciding.
How is msnbot different from Microsoft's other bots?
Microsoft splits work across multiple user-agents so site owners can decide on each one independently. Training crawlers, live-fetch agents, search indexers, and agentic browsers each get their own name. Worth scanning the rest of the Microsoft family above to see which ones actually matter for your site.
What's the cleanest way to control msnbot?
Two layers. Robots.txt for the polite crawlers that read it, and rules at your CDN or edge for the ones that don't. Rankly's Agent Experience handles both from a single config, so you can allow, block, rate-limit, or serve a stripped-down version per bot. Agent Analytics handles the observation half so you know which bots are actually worth a rule.
Verify everything above against the operator's own documentation.