A lot of services provide APIs for time-series-alike data, but these APIs often require one or two parameters to limit data sampling depth, e.g:

http://foobar/GetData?SinceTimeStamp=1702501911&TillTimeStamp=1703193111

These parameters are often expected in the HTTP URL or the HTTP body.

Zabbix already has Date and time functions support but in other places =) Is adding function support in the HTTP agent's URL and Request body possible?

More general question: is it possible to add any of the item preprocessing (especially Javascript) and any of the other function (especially math) possibilities in these 2 fields?