trying to create host by api
$json = {
jsonrpc => '2.0',
method => 'host.create',
params => {
host => 'test_from_api',
output => 'extend',
interfaces =>

{ dns => '', hostid => '25', ip => '127.0.0.1', main => '1', port => '10050', type => '1', useip => '1', }

,
groups =>

{ groupid => '2', }

,
},
auth => "$authID",
id => '21',
};
all ok.. but if change groupid to 11 or 12 or 23 or 34 etc.. (2 digits)
have this answer
"code":-32500,"message":"Application error.","data":"No permissions to referred object or it does not exist!"