curl -k -s -u $APILOGIN:$APIPASSWORD 'https://localhost:5665/v1/objects/hosts?host=clustertest3'   |jq . 
{
  "results": [
    {
      "attrs": {
        "__name": "clustertest3",
        "acknowledgement": 0,
        "acknowledgement_expiry": 0,
        "action_url": "",
        "active": true,
        "address": "",
        "address6": "",
        "check_attempt": 2,
        "check_command": "dummy",
        "check_interval": 300,
        "check_period": "",
        "check_timeout": null,
        "command_endpoint": "",
        "display_name": "clustertest3",
        "downtime_depth": 0,
        "enable_active_checks": true,
        "enable_event_handler": true,
        "enable_flapping": false,
        "enable_notifications": true,
        "enable_passive_checks": true,
        "enable_perfdata": true,
        "event_command": "",
        "flapping": false,
        "flapping_current": 0,
        "flapping_last_change": 0,
        "flapping_threshold": 0,
        "flapping_threshold_high": 30,
        "flapping_threshold_low": 25,
        "force_next_check": false,
        "force_next_notification": false,
        "groups": [
          "Allhosts"
        ],
        "ha_mode": 0,
        "handled": false,
        "icon_image": "",
        "icon_image_alt": "",
        "last_check": 1578571432.517034,
        "last_check_result": {
          "active": true,
          "check_source": "myhost",
          "command": null,
          "execution_end": 1578571432.517034,
          "execution_start": 1578571432.517034,
          "exit_status": 0,
          "output": "Exception occurred while checking 'clustertest3': Error: Invalid type in for expression: HostGroup\nLocation: in /etc/icinga2/conf.d/clustertest.conf: 20:5-26:5\n/etc/icinga2/conf.d/clustertest.conf(18):     var cluster_nodes = macro(\"$cluster_nodes$\")\n/etc/icinga2/conf.d/clustertest.conf(19): \n/etc/icinga2/conf.d/clustertest.conf(20):     for (node in cluster_nodes) {\n                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n/etc/icinga2/conf.d/clustertest.conf(21):       if (get_host(node).state > 0) {\n                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n/etc/icinga2/conf.d/clustertest.conf(22):         down_count += 1\n                                         ^^^^^^^^^^^^^^^^^^^^^^^\n/etc/icinga2/conf.d/clustertest.conf(23):       } else {\n                                         ^^^^^^^^^^^^^^\n/etc/icinga2/conf.d/clustertest.conf(24):         up_count += 1\n                                         ^^^^^^^^^^^^^^^^^^^^^\n/etc/icinga2/conf.d/clustertest.conf(25):       }\n                                         ^^^^^^^\n/etc/icinga2/conf.d/clustertest.conf(26):     }\n                                         ^^^^^\n/etc/icinga2/conf.d/clustertest.conf(27): \n/etc/icinga2/conf.d/clustertest.conf(28):     if (up_count >= down_count) {\n\n\t(0) Resolving macros for string '$dummy_state$'\n\t(1) Executing check for object 'clustertest3'\n",
          "performance_data": null,
          "schedule_end": 1578571432.517034,
          "schedule_start": 1578571432.517034,
          "state": 3,
          "ttl": 0,
          "type": "CheckResult",
          "vars_after": {
            "attempt": 2,
            "reachable": true,
            "state": 3,
            "state_type": 0
          },
          "vars_before": null
        },
        "last_hard_state": 1,
        "last_hard_state_change": 1573816947.789697,
        "last_reachable": true,
        "last_state": 1,
        "last_state_change": 1573816947.789697,
        "last_state_down": 0,
        "last_state_type": 0,
        "last_state_unreachable": 0,
        "last_state_up": 0,
        "max_check_attempts": 3,
        "name": "clustertest3",
        "next_check": 1578571490.877049,
        "notes": "",
        "notes_url": "",
        "original_attributes": null,
        "package": "_etc",
        "paused": false,
        "previous_state_change": 1573816947.789697,
        "problem": true,
        "retry_interval": 60,
        "severity": 136,
        "source_location": {
          "first_column": 1,
          "first_line": 9,
          "last_column": 26,
          "last_line": 9,
          "path": "/etc/icinga2/conf.d/clustertest.conf"
        },
        "state": 1,
        "state_type": 0,
        "templates": [
          "clustertest3"
        ],
        "type": "Host",
        "vars": {
          "cluster_nodes": {
            "__name": "testgruppe",
            "action_url": "",
            "display_name": "testgruppe",
            "groups": null,
            "name": "testgruppe",
            "notes": "",
            "notes_url": "",
            "package": "_etc",
            "source_location": {
              "first_column": 0,
              "first_line": 1,
              "last_column": 28,
              "last_line": 1,
              "path": "/etc/icinga2/conf.d/clustertest.conf"
            },
            "templates": [
              "testgruppe"
            ],
            "type": "HostGroup",
            "vars": null,
            "version": 0,
            "zone": ""
          },
          "dummy_state": {
            "arguments": [],
            "deprecated": false,
            "name": "<anonymous>",
            "side_effect_free": false,
            "type": "Function"
          },
          "dummy_text": {
            "arguments": [],
            "deprecated": false,
            "name": "<anonymous>",
            "side_effect_free": false,
            "type": "Function"
          }
        },
        "version": 0,
        "volatile": false,
        "zone": ""
      },
      "joins": {},
      "meta": {},
      "name": "clustertest3",
      "type": "Host"
    }
  ]
}