--- title: Server-Timing response headers will pass through to the... description: Starting August 10, 2026, Vercel's CDN will pass through the Server-Timing response header to clients instead of stripping it. This allows backend metrics like... canonical: https://daily.dev/posts/server-timing-response-headers-will-pass-through-to-the-client-jbqr98qhj twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Server-Timing response headers will pass through to the client | daily.dev og:description: Starting August 10, 2026, Vercel's CDN will pass through the Server-Timing response header to clients instead of stripping it. This allows backend metrics like... og:url: https://daily.dev/posts/server-timing-response-headers-will-pass-through-to-the-client-jbqr98qhj og:image: https://api.daily.dev/og/posts/jbQr98QHj.png og:image:alt: Server-Timing response headers will pass through to the client 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. # Server-Timing response headers will pass through to the client **[Vercel](https://daily.dev/sources/vercel)** · 1 min read · 0 upvotes · 0 comments ## Summary Starting August 10, 2026, Vercel's CDN will pass through the Server-Timing response header to clients instead of stripping it. This allows backend metrics like database query times and cache hits to surface in the browser's network panel and via the PerformanceServerTiming API. Developers who want to preserve the old behavior of stripping the header can configure a transform rule in vercel.json. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Server Timing: Measure And Track Backend Performance](https://daily.dev/posts/server-timing-measure-and-track-backend-performance-m1j2axzux) · DebugBear · 6 upvotes · 3 comments - [Vercel CDN now respects cache-control headers from external origins by default](https://daily.dev/posts/vercel-cdn-now-respects-cache-control-headers-from-external-origins-by-default-8plwagtqs) · Vercel · 1 upvotes · 0 comments - [Tag-based cache invalidation now available for all responses](https://daily.dev/posts/tag-based-cache-invalidation-now-available-for-all-responses-zkapj5u4f) · Vercel · 0 upvotes · 0 comments - [Cloudflare Adds Configurable HTTP Vary Header Support to Prevent Cache Thrashing](https://daily.dev/posts/cloudflare-adds-configurable-http-vary-header-support-to-prevent-cache-thrashing-xmx82ghux) · InfoQ · 0 upvotes · 0 comments - [Fixing the URL params performance penalty](https://daily.dev/posts/fixing-the-url-params-performance-penalty-61quehkfp) · Web Performance Calendar · 1 upvotes · 0 comments --- Tags: [#vercel](https://daily.dev/tags/vercel) [View this post on daily.dev](https://daily.dev/posts/server-timing-response-headers-will-pass-through-to-the-client-jbqr98qhj) ```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":"Server-Timing response headers will pass through to the client","url":"https://daily.dev/posts/server-timing-response-headers-will-pass-through-to-the-client-jbqr98qhj","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/server-timing-response-headers-will-pass-through-to-the-client-jbqr98qhj"},"datePublished":"2026-07-30T17:56:55.145Z","dateModified":"2026-08-24T06:56:56.741Z","description":"Starting August 10, 2026, Vercel's CDN will pass through the Server-Timing response header to clients instead of stripping it. 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