JIRA REST API: query JIRA issue summary

Enable JIRA to accept remote API calls:

Enable Accept remote API calls (Administrator > General Configuration > Set Accept remote API calls to On)

Examples for http and https with summary field display

curl -s -u <jira-user>:<jira-password> -X GET -H "Content-Type: application/json" http://<jira-server>:9090/rest/api/2/search?jql=key=<jira-key>&fields=summary

curl -sk -u <jira-user>:<jira-password> -X GET -H "Content-Type: application/json" http://<jira-server>:8443/rest/api/2/search?jql=key=<jira-key>&fields=summary