Atlassian's authorize page for the 50heads Jira app, with a signed state that works once, for 10 minutes.

Portal session only; in a team, the owner or an admin. Atlassian sends the person back to the portal's Integrations page with installed=jira, or error= denied, expired, already_installed or failed. One Jira site per install. 503 jira_not_configured when the Atlassian app is not set up; 404 while the Jira app is off on this server.