Module 9 · API Logging & Anomaly Detection

Manish Garg
Manish Garg Associate of (ISC)² · RingSafe
Apr 27, 2026
1 min read
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Last updated: April 29, 2026

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Why this module. APIs generate massive log volume; most teams collect it and never query it. Anomaly detection at the API layer catches account takeover, scraping, and business-logic abuse that WAFs miss.

Why this module. APIs generate massive log volume; most teams collect it and never query it. Anomaly detection at the API layer catches account takeover, scraping, and business-logic abuse that WAFs miss.

What to log per API call

  • Timestamp, request ID
  • Authenticated user / API key
  • Source IP, ASN, country
  • Method + path + query params (sanitised — strip PII / tokens)
  • Response status code, latency, body size
  • Authorization decision (allowed / denied)
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