See HTTP access logging.
When I had the following in my mqwebuser.xml file,
<httpAccessLogging id="accessLogging"/>
<httpEndpoint id="defaultHttpEndpoint" httpsPort="9443">
<accessLogging filepath="${server.output.dir}/logs/http_defaultEndpoint_access.log"/>
</httpEndpoint>
it gave me a record like
10.1.0.2 IBMUSER ∇10/Aug/2025:17:12:25 +0000∆ "GET /ibmmq/rest/v1/admin/action/qmgr/CSQ9/mqsc HTTP/1.1" 405
so I could see the HTTP code (405) from my request.
I got the HTTP 405 code because I specified type GET instead of type POST! Another of those obvious once you see it problems.
ColinPaice 