PP have some macros which can change the URL, for example:
https://api.example.org/foobar?id=12345&startDate={TODAY:yyyy-MM-dd:-P1M}
This URL is pure fantasy, just interesting is the part in “{…}”, it builds automaticly a date one month ago.
So far the answer is yes.
Normally not, only in special cases that were specially built for this purpose, e.g. this Swiss construction Historische Kurse von VIAC - #133 by KopolJunam
It can also work if you set up a data-modifying proxy yourself, which does the conversion from CSV to JSON. This is the hard way.
But usually the broker APIs give out JSON all by themselves, so if you say which security it is actually about, someone can certainly tell you how to get quotes for it.