What is IC-Cached-For?

I can’t find any documentation about these two headers. Can anyone help me confirm whether these are generated by Cloudflare? Thanks

IC-Cached-For: 7200
IC-Generated-At: 2022-05-28T06:53:06-07:00

Here’s the full set of response headers from my test request:

Date: Sat, 28 May 2022 15:47:35 GMT
Content-Type: application/json; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
CF-Ray: 712821350825fda5-PDX
Access-Control-Allow-Origin: *
Age: 6869
Cache-Control: public, max-age=1800
Last-Modified: Sat, 28 May 2022 13:53:06 GMT
Vary: Origin
Via: 1.1 vegur
CF-Cache-Status: HIT
Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
IC-Cached-For: 7200
IC-Generated-At: 2022-05-28T06:53:06-07:00
Server: cloudflare
alt-svc: h3=":443"; ma=86400, h3-29=":443"; ma=86400

Those aren’t Cloudflare specific headers and must be coming from the origin. I’d recommend looking at the documentation for the origin server.


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