Our JMeter Cloud is fully compatible with JMeter and any of its samplers, including BSF.

To import your project into BlazeMeter, all you need to do is:
1. Upload any JMX file you use
2. Upload any other files your JMX scripts use (e.g. CSV files, data files)
3. Upload any proprietary JARs if you use.

Last thing, consider that any local path should be removed. E.g. c:\My Document\myfile.data is a bad local path. Instead it should say: myfile.data (no local path).