# Server-Timing response headers will pass through to the client

DevFeed: [Server-Timing response headers will pass through to the client](<https://devfeed.tech/articles/server-timing-response-headers-will-pass-through-to-the-client-1091.md>)

Original publisher: [Read original article](<https://vercel.com/changelog/server-timing-header>)

Author: Steven Salat

Published: 2026-07-30T12:00:00Z

Content type: release

Language: en

Sources: [Vercel News](<https://devfeed.tech/sources/vercel-news.md>)

Topics: [Vercel](<https://devfeed.tech/topics/vercel.md>), [Caching](<https://devfeed.tech/topics/caching.md>), [browser](<https://devfeed.tech/topics/browser.md>), [API](<https://devfeed.tech/topics/api.md>), [Back end](<https://devfeed.tech/topics/backend.md>)

Tags: [2026](<https://devfeed.tech/tags/2026.md>), [api](<https://devfeed.tech/tags/api.md>), [backend](<https://devfeed.tech/tags/backend.md>), [browser](<https://devfeed.tech/tags/browser.md>), [cache](<https://devfeed.tech/tags/cache.md>), [cdn](<https://devfeed.tech/tags/cdn.md>), [performance](<https://devfeed.tech/tags/performance.md>), [vercel](<https://devfeed.tech/tags/vercel.md>)

## AI overview

Vercel's CDN will pass the Server-Timing response header through to clients starting August 10, 2026. This enables backend metrics such as database query time and cache hits to appear in browser network panels and through the Performance API.

## Source excerpt

On August 10, 2026, Vercel's CDN will stop stripping the Server-Timing response header and begin passing it through to the client. Use Server-Timing to report backend metrics like database query time and cache hits. These values appear in the browser's network panel and as PerformanceServerTiming entries through the Performance API. If you want to keep the current behavior, where the header is stripped from every response, you can add a transform in vercel.json: Learn more about the Performance API and Server Timing. Read more