addonKey
can make this request.curl --location --request GET 'http://jira.local:8080/jira/rest//rest/atlassian-connect/1/addons//properties'
{
"keys": [
{
"self": "https://your-domain.atlassian.net/jira/rest/atlassian-connect/1/addon/example.app.key/properties/propertyKey",
"key": "propertyKey"
}
]
}