Origin-Agent-Cluster

Response headers

Asks the browser to keep this origin in its own isolated agent cluster.

On the wireOrigin-Agent-Cluster: …
CategoryResponse headers

Headers the server attaches when it answers.

How to read this

  • The first digit of a status code carries the meaning: 4 means the request, 5 means the server.
  • 404 means "not there"; 403 means "there, but not for you". Swapping them makes debugging slower.
  • Header names are case-insensitive — Content-Type and content-type are the same header.
  • Caching and CORS problems usually come down to one header line, visible in the browser’s network tab.

Frequently asked questions

Q. What does HTTP Origin-Agent-Cluster mean?

Asks the browser to keep this origin in its own isolated agent cluster.

Q. What does Origin-Agent-Cluster look like on the wire?

It travels as Origin-Agent-Cluster: …

Q. Where does Origin-Agent-Cluster appear?

In response headers.

Q. What group does Origin-Agent-Cluster belong to?

The response headers group; the rest of that group is listed further down.

Same group

Reference docs