CacheSleuth

CacheSleuth is a web app (with a lightweight CLI agent) that pinpoints why your CDN isn’t caching what you think it is. It continuously probes key URLs from multiple regions, records response headers (Cache-Control, Vary, Set-Cookie), detects personalized responses, and flags cache-busting query patterns. It then produces a prioritized “fix list” with concrete recommendations: header changes, route rules, cookie stripping, origin compression, and TTL adjustments—mapped to common CDNs (Cloudflare, Fastly, Akamai) without requiring full log access. The goal is brutally practical: reduce origin egress, improve TTFB, and stop surprise bills caused by low cache hit ratios. It’s not a magic optimizer; it’s a diagnostic tool that makes caching behavior observable and actionable for teams that don’t have time to become CDN experts.