Thanks for your quick response paolo but the apps call(/v2/spaces/$space-id/apps) will not give any information about instances like this https://apidocs.cloudfoundry.org/242/apps/get_the_instance_inf

Hi, We are interested in getting app instance details for all apps within a space. space summary '/v2/spaces/50ae42f6-346d-4eca-9e97-f8c9e04d5fbe/summary' call gives only info about 'running_instances