--- title: When Should You Cache API Calls at the Edge? | daily.dev description: Edge caching works best when content is large, geographically distributable, and doesn't need per-request server-side logic. Security-sensitive or... canonical: https://daily.dev/posts/when-should-you-cache-api-calls-at-the-edge--jrebzxtxt twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: When Should You Cache API Calls at the Edge? | daily.dev og:description: Edge caching works best when content is large, geographically distributable, and doesn't need per-request server-side logic. Security-sensitive or... og:url: https://daily.dev/posts/when-should-you-cache-api-calls-at-the-edge--jrebzxtxt og:image: https://api.daily.dev/og/posts/JREbzxTxt.png og:image:alt: When Should You Cache API Calls at the Edge? og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # When Should You Cache API Calls at the Edge? **[Nordic APIs](https://daily.dev/sources/nordicapis)** · 12 min read · 0 upvotes · 0 comments ## Summary Edge caching works best when content is large, geographically distributable, and doesn't need per-request server-side logic. Security-sensitive or server-logic-driven content should stay in server-side caches instead. Netflix uses regional edge delivery, with some auth flows managed regionally and user validation at a central system, while a Sony PlayStation patent (US 2026/0034441 A1) streams higher-quality game assets from nearby edge caches while keeping code execution and authentication on remote servers. Industrial systems use edge caching so low-power PLCs can keep state locally while data is sent elsewhere for processing. Semantic caching, suited to LLM and AI API traffic, matches requests by similarity rather than exact cache keys. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### When should I use edge caching versus server-side caching for my API? Edge caching works best when content is large, geographically distributable, and doesn't require per-request server-side logic, since it reduces latency by serving data closer to users. Security-sensitive, state-dependent, or server-logic-driven content should instead stay in the server cache layer, where the provider retains more control and better security. _daily.dev surfaces architecture trade-off write-ups like this for teams deciding where to place their caching layer._ ### How does Netflix handle caching and authentication for geographically restricted content? Netflix uses a hybrid approach: content delivery happens at regional edge servers (for example East Coast versus West Coast clusters in the US), while authorization happens at the regional edge and user validation is centrally managed. This lets geographically locked titles, common in anime licensing, stay restricted while reducing latency for users within an allowed region. _Engineers designing region-locked content delivery can track real-world CDN patterns like this on daily.dev._ ### What is semantic caching and how is it different from traditional caching? Semantic caching matches requests by similarity rather than exact cache-key lookups, unlike traditional caching which works like a dictionary lookup requiring an exact key match. This fuzziness makes it well suited to the probabilistic nature of LLM and AI API traffic, where a query for 'parrot' might reasonably match a cached result for 'bird'. _Developers building LLM-backed APIs can follow emerging caching techniques like this through daily.dev._ ## Similar posts on daily.dev - [Edge Functions vs Serverless 2026: The Honest Truth](https://daily.dev/posts/edge-functions-vs-serverless-2026-the-honest-truth-tjktppggt) · Alex CloudStar · 0 upvotes · 0 comments - [Building Global Web Apps? Reduce Latency with Edge Computing](https://daily.dev/posts/building-global-web-apps-reduce-latency-with-edge-computing-a1igzono2) · Syncfusion · 0 upvotes · 0 comments - [Multiple Places Where Caching Exists](https://daily.dev/posts/multiple-places-where-caching-exists-3hmlfagkv) · System Design Codex · 5 upvotes · 0 comments - [Edge clouds and local data centers reshape IT](https://daily.dev/posts/edge-clouds-and-local-data-centers-reshape-it-wajhjtn2g) · InfoWorld · 0 upvotes · 0 comments --- Tags: [#architecture](https://daily.dev/tags/architecture) [View this post on daily.dev](https://daily.dev/posts/when-should-you-cache-api-calls-at-the-edge--jrebzxtxt) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"When Should You Cache API Calls at the Edge?","url":"https://daily.dev/posts/when-should-you-cache-api-calls-at-the-edge--jrebzxtxt","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/when-should-you-cache-api-calls-at-the-edge--jrebzxtxt"},"datePublished":"2026-10-27T08:07:30.044Z","dateModified":"2026-10-27T08:07:59.645Z","description":"Edge caching works best when content is large, geographically distributable, and doesn't need per-request server-side logic. 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