Yes. We control both ends. The requester and handler. Older web services (built with Xojo 2019r3.2) used both GET and POST, but we can migrate newer versions to just use POST.
The limit appeared to be 2K before Web 2.0, but now appears to be 256 characters. We never used that many before, but it looks like sometimes the GET parameters can be more than 256 characters.
So far for us, Web 2.0 (and API 2.0) has given us nothing but a development headache. It has provided us no new functionality and we’ve had to update a huge amount of code, just to stay the same (Arrays, String, Events)