Sec,fetch,site:,cross,site -

This looks like you're piecing together the technical components of , specifically those used for Cross-Origin Resource Sharing (CORS) and Cross-Site Request Forgery (CSRF) protection. The Concept: Fetch Metadata ( sec-fetch-* )

— Indicates the "what" (data fetch, not an image or script). sec,fetch,site:,cross,site

If you are looking for the exact syntax used in a network request, it usually looks like this: This looks like you're piecing together the technical

: A user on site-a.com clicks a button that sends a POST to site-b.com . : The server sees cross-site on a sensitive

: The server sees cross-site on a sensitive POST action and rejects it because it knows this request didn't originate from its own trusted frontend. Summary of the Headers

: This is the most critical header in your list. It tells the server the relationship between the request initiator's origin and the target resource's origin.