AI BriefingServer-Timing response header will be forwarded to the client
Key point
Starting August 10, 2026, Vercel CDN will forward the Server-Timing response header directly to the client.
Details
Starting August 10, 2026, Vercel CDN will begin forwarding the Server-Timing response header to the client. This allows developers to check backend metrics such as database query time or cache hit status through the browser's network panel or the Performance API.
Using the Server-Timing header, you can report data such as:
- Database query execution time
- Cache hits status and performance
If you want to keep the existing behavior of removing this header from all responses, you can configure the transforms setting in vercel.json to delete the server-timing header.
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