Get Project Property Keys
GET {{baseUrl}}/rest/api/3/project/:projectIdOrKey/properties
Returns all project property keys for the project.
This operation can be accessed anonymously.
Permissions required: Browse Projects project permission for the project.
RESPONSES
status: OK
{"keys":[{"self":"https://your-domain.atlassian.net/rest/api/3/issue/EX-2/properties/issue.support","key":"issue.support"}]}