Solution

In the api-response ,it’s always formatted into either List of Map or Map of List.

List of Map is Like :

[

 {
   "name":"ruby",
   "gender":"female"
 },

 {
   "name":"otis",
   "gender":"male"
 },

]

And, Map of List is Like :

{
    "data": [
        "Professor",
        "Berlin",
        "Tokyo"
    ]
}

So to access them you have to use JsonDecode and then look the response and process that.

For Map response ….

var resMap = jsonDecode(response.body);

For List response (use key after resMap with key)…

var resMap = jsonDecode(response.body);
var infoList = resMap["data"];

Demo

class CatTypeController {
  Future<void> getLeaves() async {
    String url = "https://meowfacts.herokuapp.com/?count=2";

    http.Response response = await http.get(Uri.parse(url));

    if (response.statusCode == 200) {
      Map rM = jsonDecode(response.body);
      print(rM["data"]);
    }
  }
}

Response

Output

["In ancient Egypt, killing a cat was a crime punishable by death.","The way you treat kittens in the early stages of it's life will render it's personality traits later in life."]