How to get many issues with Jira REST API? - rest

Question

New to REST API, and struggling a little.
I learned recently from here and here that I can receive a JSON describing an issue by calling a REST API of the form <JIRA_BASE_URL>/rest/api/2/issue/{issueIdOrKey}, e.g.:
curl -s -X GET -u super_user:super_password https://jira.server.com/rest/api/2/issue/TEST-12
Is there a way I can query many issues at once if I have a list of issue-ids, e.g. ["TEST-12", "TEST-13", "TEST-14"]?
I'm specifically interested in getting the summary field of each issue in my list of issue-ids. I.e. I'm trying to create a map of [issue-id:summary]. I currently do this by invoking the above curl command in a loop for each issue-id in my list. But I observe that this takes a long time, and I wonder if performance might be improved if there's a way to do a "bulk get" -- if such a feature exists.

Answer 1

Give the JQL Search API endpoint a try:
https://jira-url/rest/api/latest/search?fields=summary&jql=key%20in%20(TEST-12,%20TEST-13)
The fields parameter limits the fields returned, and the jql parameter lists out an array of the issue keys you'd like to retrieve.
The response looks like this:
{
...
"startAt": 0,
"maxResults": 50,
"total": 2,
"issues": [
{
...
"key": "TEST-12",
"fields": {
"summary": "TEST-12 Summary"
}
},
{
...
"key": "TEST-13",
"fields": {
"summary": "TEST-13 Summary"
}
}
]
}