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 * Bot Management home

 * Overview
 * Expand: Get started Get started
    * Free
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    * Enterprise Bot ManagementExternal link icon Open external link

 * Expand: Concepts Concepts
    * Bots
    * Bot scores
    * Challenge Solve Rate (CSR)
    * Bot Tags
    * Bot Feedback Loop
    * Detection IDs
    * JA3 Fingerprint

 * Plans
 * Expand: Bot Analytics Bot Analytics
    * Business
    * Enterprise Bot Management

 * Expand: Reference Reference
    * Bot Management skips
    * Bot Management variables
    * JavaScript detections
    * Machine Learning models
    * Static resource protection
    * Super Bot Fight Mode for WordPress
    * Verified Bots Policy

 * FAQs





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 * ↑ Top
 * Bot groupings
 * How Cloudflare generates bot scores
   * Heuristics
   * Machine learning
   * Anomaly detection
   * JavaScript detections
   * Cloudflare service
   * Not computed
   * Notes on detection
 * Comparison to Threat Score


 1. Products
 2. Bots
 3. Concepts
 4. Bot scores


BOT SCORES

A bot score is a score from 1 to 99 that indicates how likely that request came
from a bot.

For example, a score of 1 means Cloudflare is quite certain the request was
automated, while a score of 99 means Cloudflare is quite certain the request
came from a human.

Bot scores are available to be used in Firewall fields and with Workers to
customize application behavior. For more details, refer to Bot Management
variables.

Note:
Granular bot scores are only available to Enterprise customers who have
purchased Bot Management. All other customers can only access this information
through bot groupings in Bot Analytics.


BOT GROUPINGS

Customers with a Pro plan or higher can automatically see bot traffic divided
into groups by going to Security > Bots.

CategoryRangeNot computedBot scores of 0.AutomatedBot scores of 1.Likely
automatedBot scores of 2 through 29.Likely humanBot scores of 30 through
99.Verified botNon-malicious automated traffic (used to power search engines and
other applications).

Note:
Bot scores are not computed for requests to paths that are handled by Cloudflare
and will never be blocked or forwarded to the origin.


HOW CLOUDFLARE GENERATES BOT SCORES

Note:
The following detection engines only apply to Enterprise Bot Management. For
specific details about the engines included in your plan, refer to Plans.


HEURISTICS

The Heuristics engine processes all requests. Cloudflare conducts a number of
heuristic checks to identify automated traffic, and requests are matched against
a growing database of malicious fingerprints.


The Heuristics engine immediately gives automated requests a score of 1.


MACHINE LEARNING

The Machine Learning (ML) engine accounts for the majority of all detections,
human and bot.

This approach leverages our global network, which proxies billions of requests
daily, to identify both automated and human traffic. We constantly train the ML
engine to become more accurate and adapt to new threats. Most importantly, this
engine learns from traffic across all Cloudflare domains and uses these insights
to score traffic while honoring our strict privacy standardsExternal link icon
Open external link .

The ML engine produces scores 2 through 99.


ANOMALY DETECTION

The Anomaly Detection (AD) engine is an optional detection engine that uses a
form of unsupervised learning. Cloudflare records a baseline of your domain’s
traffic and uses the baseline to intelligently detect outlier requests. This
approach is user agent-agnostic and can be turned on or off by your account
team.

Cloudflare does not recommend AD for domains that use Cloudflare for SaaS or
expect large amounts of API traffic. The AD engine immediately gives automated
requests a score of one.


JAVASCRIPT DETECTIONS

The JavaScript Detections (JSD) engine identifies headless browsers and other
malicious fingerprints. This engine performs a lightweight, invisible JavaScript
injection on the client side of any request while honoring our strict privacy
standardsExternal link icon Open external link . We do not collect any
personally identifiable information during the process. The JSD engine either
blocks, challenges, or passes requests to other engines.

JSD is enabled by default but completely optional. To adjust your settings, open
the Bot Management Configuration page from Security > Bots.


CLOUDFLARE SERVICE

Cloudflare Service is a special Bot Score source for Enterprise Zero Trust to
avoid false positives.



NOT COMPUTED

A bot score of 0 means Bot Management did not run on the request. Cloudflare
does not run Bot Management on internal service requests that Bot Management has
no interest in blocking.

Workers subrequests from one Cloudflare zone to another Cloudflare zone do
compute a bot score as it does not consider a site hosted on Cloudflare as
internal.


NOTES ON DETECTION

Cloudflare uses the __cf_bm cookie to smooth out the Bot Score and reduce false
positives for actual user sessions.

The Bot Management cookie measures a single user’s request pattern and applies
it to the machine learning data to generate a reliable Bot Score for all of that
user’s requests.

For more details, refer to Cloudflare Cookies.


COMPARISON TO THREAT SCORE

Bot Score is different from Threat Score. Bot Score identifies bots and Threat
Score measures IP reputation across our services. Most customers achieve the
best results by relying on bot scores and avoiding IP reputation entirely.

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