To find your Jira Software URL:
Open Jira in your web browser (on your device, or on your computer or laptop)
Copy the address from your browser's address bar. In some browsers you may need to tap or click the address bar to see the full URL.If you're viewing the dashboard, the Jira URL is everything that comes before /secure.
ℹ️ If your URL is something like mycompany.atlassian.net, then you're using Jira Cloud and Marker.io will work perfectly with your Jira.
However, If you're using a self-hosted JIRA instance, read this post first and come back here.