You need to configure any external web server for Windows or Linux.

After that you need to add https to this web server.

Please elaborate. What do you want to achieve?

That depends on os/webserver you use.

You need to configure https in your web server.

%request.Content is a stream with all JSON payload.

If you want to process HTTP requests, you can use REST API.

It's called topics. Tag is a git pointer to a commit (usually to mark release point).

1. Try setting RenderTimeOut and PrintTimeOut properties for the report.
2. Check logfile (you can determine directory in which it gets created by instantiating the report and calling GetRootDir method, but usually it's a value of the ^%SYS("TempDir") global, unless you specify ReportDir property or parameter).

MDX2JSON api provides postman collection and environment. You can use it as an example.

Here's a screenshot of POST request:

To add, names of REST arguments in URL should correspond and be in the same order, as method arguments.

Here's a Caché ObjectScript style guidelines.

Is there a sample of using callback somewhere?

When encountering errors with XSLT I usually try to execute it here to check that it is valid and produces correct result.

As you're trying to use XSLT2 package, have you tried XSLT package?

Have you tried XSLT without callback?

You can mark correct answer by pressing a checkmark left of the answer.

If you want to run Ensemble REST Services, here's how.

Check REST.DocServer class in SAMPLES namespace.

Have you read documentation?

What do you want to achieve?

Use scrollable resultset.