I want to create JIRA Issue using Nintex Workflow. There is a posting on this community that provides example for using JIRA SOAP API but I can't find anything for REST API. I am using JIRA 7.10 and the SOAP API was removed. I am using Sharepoint 2013 and Nintex Workflow 2013.
For this, you will have to find more information on JIRA itself. Unfortunately, not a lot of people here use JIRA so maybe hopping on the JIRA forum and asking them about their APIs. I know that its possible to hit a REST API via Nintex, but you will have to find the API information to execute with.
I do not know what the JIRA is at all, so just few general comments...
if you explored your example page a bit more you could eg find following page that defines which communication method should be used for which REST endpoint, and further details on endpoint.
so ..../createmeta endpoint expects GET method to use to communicate with it.
in the example you attached, you seem to input endpoint URL mulitple times in an URL field, making the whole URL invalid.