Apex REST GET

clickupservice.cls

public with sharing class ClickUpTaskService {

    private static String apiKey = '';

    public static void call() {

        Http http = new Http();
        HttpRequest request = new HttpRequest();
        request.setEndpoint('https://api.clickup.com/api/v2/list/900600512507/task');
        request.setMethod('GET');
        request.setHeader('Authorization', apiKey);
        HttpResponse response = http.send(request);

        List<ClickUpTask> tasks = new List<ClickUpTask>();

        // If the request is successful, parse the JSON response.
        if(response.getStatusCode() == 200) {
            Map<String, Object> results = (Map<String, Object>) JSON.deserializeUntyped(response.getBody());
            // Cast the values in the 'tasks' key as a list
            List<Object> resultsTasks = (List<Object>) results.get('tasks');
            for(Object task: resultsTasks) {
                tasks.add((ClickUpTask)(JSON.deserialize(JSON.serialize(task), ClickUpTask.class)));  
            }
        }
        System.debug(tasks.size());          
    }

    public class ClickUpTask {
        public String id;
        public String name;
        public String description;
        public Boolean archived;
        public String url;
        public Map<String, String> status;
        public Map<String, String> project;
        public Map<String, String> folder;
        public Map<String, String> space;
    }
}