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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 SSL for SaaS or expect large amounts of API traffic. The AD engine immediately gives automated requests a score of one.