Class 'int' has no instance getter 'id' with filter list data in flutter

I try to make filter list data in flutter to filter the id or name from api data but I get every time this error:

Class 'int' has no instance getter 'id'.
Receiver: 1171
Tried calling: id

My page code:

class testpage extends StatefulWidget {
  const testpage({Key? key}) : super(key: key);

  @override
  _testpageState createState() => _testpageState();
}

class _testpageState extends State<testpage> {
  var apiURL;
  @override
  void initState() {
    Searchgetdata();
    super.initState();
  }

  List listsearch = [];
  Future Searchgetdata() async {
    apiURL =
    '**************';
    var response = await http.post(Uri.parse(apiURL));
    setState(() {
      List jsonList = jsonDecode(response.body);
      for (int i = 0; i < jsonList.length; i++) {
       listsearch.add(jsonList[i]['id']);
print(listsearch);
      }
    });
  }
  @override
  Widget build(BuildContext context) {
    final _filteredList = listsearch.where((product) => product.id == '1202').toList();//here problem......
   print(_filteredList);
    return MaterialApp(home: Scaffold(
      body: ListView(
          children: [

    ]
      ),
    ),
    );
  }
}

I'm sure the api connection is correct and the data is fetched through it.

Update this is print data what I get from api: I make this line like that to just print id:

   listsearch.add(jsonList[i]['id']);

then I get this data:

I/flutter ( 4792): [695, 523, 908, 522, 987, 727, 1162, 1586, 862, 746, 780, 916, 1428, 1218, 686, 745, 942, 902, 829, 851, 751, 792, 713, 900, 910, 532, 698, 913, 690, 668, 836, 663, 1221, 849, 928, 679, 898, 852, 909, 1229, 1223, 824, 742, 875, 1169, 1407, 1029, 901, 611, 893, 1203, 1202, 1340, 688, 681, 1215, 1170, 922, 895, 1036, 724, 1211, 1249, 737, 1224, 872, 1220, 1168, 796, 662, 682, 822, 670, 680, 669, 1409, 789, 856, 912, 689, 517, 1410, 897, 605, 921, 1138, 612, 1163, 1263, 741, 1226, 1219, 904, 783, 1228, 725, 1213, 864, 795, 1204, 903, 1276, 613, 1206, 1433, 965, 1216, 696, 527, 714, 1230, 981, 736, 894, 610, 672, 609, 854, 790, 691, 914, 855, 966, 896, 666, 723, 831, 797, 687, 722, 726, 674, 1201, 850, 1171, 738, 739, 1099, 899, 848, 671, 684, 964, 743, 1255, 787, 1172, 694, 1118, 1227, 750, 870, 566, 525, 915, 1100, 917, 1342, 1205, 1408, 667, 606, 794, 665, 1113, 608, 847, 536, 853, 685, 1160, 607, 675, 699, 516, 906, 1225, 1212, 865, 866, 863, 740, 701, 673, 907, 728, 1431, 911, 1222, 1256, 712, 683, 748, 121

anyone can help me thanks you