Server side api getting error 504

Hello all,
looking for help
I am getting a 504 error from a server side api when calling very long feeder(http).
Apparently there is a problem with the php scripts invoked. May be it would help if I could know which access method you are using for http call.
I am using a stack of Debian/Apache2.4/PHP8.
The transactions called from the api usually take over 2 minutes to finish.
Thanks for any help.