Problem Definition

There is no public REST API endpoint able to assign issues to plan-specific teams.

Suggested Solution

Implement a public REST API endpoint able to change issue's teams within plans.

Workaround

Only if the teams are shared (instead of plan-specific), it's possible to use Jira's own API to edit the issue and change the value in this custom field. The specific endpoint is the one below:

• PUT /rest/api/2/issue/{issueIdOrKey}

Example:

• replace user:pw or add the auth method of your choice. ISSUEKEY-123 is the issue key, 22123 is the custom field ID and 599 is the Team ID.

curl -D- -u user:pw -X PUT -H "Content-Type: application/json" <baseurl>/rest/api/2/issue/ISSUEKEY-123 --data '{
   "fields": {
       "customfield_22123":"599"
   }}'