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GKData.io MCP

World Wide Web Consortium · 1 min read

Fetch Metadata Request Headers

Defines browser-provided request context covering site relationship, destination, mode, and user activation. Explains how redirect history affects that context and why context-dependent responses need matching cache behavior. This supports reasoning about which browser interactions an application intends to accept.

Open the reference Technical StandardReviewed 2026-10-03

How to use this reference

Review an owned service’s documented request-context policy, including redirects, legitimate cross-origin use, and caching. Treat browser context as an additional policy input rather than proof of a user’s resource permissions.

Before reading

  • HTTP requests and response caching
  • Same-origin and same-site distinctions

Context and limits

  • The reviewed edition is a Working Draft, not a final W3C Recommendation.
  • The draft does not establish support in every deployed browser or non-browser client.

Sources and provenance

  1. Fetch Metadata Request Headers World Wide Web Consortium · reviewed 2026-10-03
  2. Fetch Metadata Request Headers publication history World Wide Web Consortium · reviewed 2026-10-03

Record reviewed 2026-10-03. Snapshot 53796974ace8. Open the complete JSON contract.

GitHub snapshot 2026-10-04

53796974ace8 · JSON exports & schemas · CC BY 4.0 content / MIT software