Cucumber for Jira is available only for Jira Cloud instances.
Prerequisite
You need Jira administrator rights to install the Cucumber for Jira app.
Installation
In Jira Settings, go to the Apps tab.
Go to the Find new apps tab, fill the Filter apps field with Cucumber for Jira and selected it
Click on Try it free at the right top to install it and confirm by clicking on Start trial.
That’s it! Cucumber for Jira is now installed.