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Directory Crawlers

Bingbot Bot

Builds a search index, operated by microsoft. Crawl the web for training, search or data.

Operator
microsoft
Kind
Crawlers
Does
Builds a search index
Traffic
Its operator’s own
robots.txt
bingbot
View as Markdown

Identity

Publishes its IP addresses

  1. SignedSigns every request (Web Bot Auth): cryptographic proof.
  2. IP listPublishes the IP addresses it comes from.
  3. Reverse DNSIts IP addresses resolve to the operator’s domain.
  4. User agentNames itself in its user agent, which anyone can copy.
  5. HiddenLooks like a person’s browser: detected by behaviour.

How to recognise it

  • Reverse DNS

    The hostname ends in search.msn.com, then forward-confirmed.

  • User agent

    Contains bingbot, adidxbot, BingPreview, MicrosoftPreview. Anyone can copy it, so it names the client without proving it.

Details

ID
microsoft.bingbot
Category
Bot
Operator
microsoft
Agent Card
Not published: this agent doesn’t identify itself with an Agent Card.
First seen
2026-09-28

Registrations

Reputation

Computed 2026-11-13

—No score yet
Confidence8%

A score shows from 30%

  • Identity40% of the score19 / 100

    0 verified sources

    A verified Agent Card adds 25 points, 40 if it is signed.

  • Reviews35% of the score–

    No reviews yet

    From the ERC-8004 reputation registry, weighted by who wrote them.

  • Observed25% of the score–

    Not enough sightings yet

    Counts once it is seen on 10 or more Double Agent sites.

Change history

No card history: this agent doesn’t publish an Agent Card.

Allow or block

To opt out, add this to your robots.txt.

Double Agent keeps labelling it either way, so you can see whether it listens.

User-agent: bingbot
Disallow: /

With Double Agent

Sessions from Bingbot are labelled bot with agent_id: microsoft.bingbot, and tagged in your analytics. Nothing is blocked unless you choose to.

Install Double Agent

Related

All 226 clients

Source: https://www.bing.com/webmasters/help/which-crawlers-does-bing-use-8c184ec0