How I can find all modules and scripts in JIRA which using soap-rpc api access?
Can I do this via GUI? or some other way?
There aren't any. JIRA doesn't use SOAP internally, it's for other things to talk to JIRA.
If you've written something that does use SOAP internally, that's fine, but you'll need to track it down manually - JIRA's SOAP service simply listens and responds. It has no idea what might be using it.
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