In documentation output like this:
{
"jsonrpc": "2.0",
"method": "host.get",
"params": {
"output": "extend",
"filter":

{ "host": [ "Zabbix server", "Linux server" ] }

},
"auth": "038e1d7b1735c6a5436ee9eae095879e",
"id": 1
}

{
"jsonrpc": "2.0",
"result": [

{ "maintenances": [], "hostid": "10167", "proxy_hostid": "0", "host": "Linux server", "status": "0", "disable_until": "0", "error": "", "available": "0", "errors_from": "0", "lastaccess": "0", "ipmi_authtype": "-1", "ipmi_privilege": "2", "ipmi_username": "", "ipmi_password": "", "ipmi_disable_until": "0", "ipmi_available": "0", "snmp_disable_until": "0", "snmp_available": "0", "maintenanceid": "0", "maintenance_status": "0", "maintenance_type": "0", "maintenance_from": "0", "ipmi_errors_from": "0", "snmp_errors_from": "0", "ipmi_error": "", "snmp_error": "", "jmx_disable_until": "0", "jmx_available": "0", "jmx_errors_from": "0", "jmx_error": "", "name": "Linux server" }

],
"id": 1
}

The true result is:

{
"jsonrpc": "2.0",
"result": [{
"templates":[

{"templateid":"0","hostid":"0"}

],
"maintenances": [],
"hostid": "10167",
"proxy_hostid": "0",
"host": "Linux server",
"status": "0",
"disable_until": "0",
"error": "",
"available": "0",
"errors_from": "0",
"lastaccess": "0",
"ipmi_authtype": "-1",
"ipmi_privilege": "2",
"ipmi_username": "",
"ipmi_password": "",
"ipmi_disable_until": "0",
"ipmi_available": "0",
"snmp_disable_until": "0",
"snmp_available": "0",
"maintenanceid": "0",
"maintenance_status": "0",
"maintenance_type": "0",
"maintenance_from": "0",
"ipmi_errors_from": "0",
"snmp_errors_from": "0",
"ipmi_error": "",
"snmp_error": "",
"jmx_disable_until": "0",
"jmx_available": "0",
"jmx_errors_from": "0",
"jmx_error": "",
"name": "Linux server"
}
],
"id": 1
}