String urlString = String.format("https://simpleflags.io/api/flag/%s/%s/%s/%s",
  "TEAM_ID", "FLAG_KEY", "ENV_KEY", "GROUP_KEY");
URL url = new URL(urlString);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");

BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
StringBuilder response = new StringBuilder();
String inputLine;

while ((inputLine = in.readLine()) != null) {
  response.append(inputLine);
}
in.close();

boolean isEnabled = response.toString().contains(""status":"enabled"");

if (isEnabled) { 
  // Do something if the feature flag is enabled
}

# Apply in your preferred language

curl https://simpleflags.io/api/flag/{teamId}/{flagKey}/{environmentKey}/{groupingKey}
# {"status":"disabled"}

<?php
$teamId = "TEAM_ID";
$environmentKey = "ENV_KEY";
$flagKey = "FLAG_KEY";
$groupingKey = "GROUP_KEY";

$url = "https://simpleflags.io/api/flag/$teamId/$flagKey/$environmentKey/$groupingKey";
$response = file_get_contents($url);
$isEnabled = strpos($response, '"status":"enabled"') !== false;

if ($isEnabled) {
  // Do something if the feature flag is enabled
}
?>

require 'net/http'
require 'uri'
require 'json'

uri = URI.parse("https://simpleflags.io/api/flag/TEAM_ID/FLAG_KEY/ENV_KEY/GROUP_KEY")
response = Net::HTTP.get_response(uri)
isEnabled = JSON.parse(response.body)["status"] == "enabled"

if isEnabled
  # Do something if the feature flag is enabled
end

import requests

url = "https://simpleflags.io/api/flag/TEAM_ID/FLAG_KEY/ENV_KEY/GROUP_KEY"
response = requests.get(url)
data = response.json()
isEnabled = data["status"] == "enabled"

if isEnabled:
    # Do something if the feature flag is enabled

using System;
using System.Net.Http;
using System.Threading.Tasks;
using Newtonsoft.Json.Linq;

class Program
{
    static async Task Main(string[] args)
    {
        string url = "https://simpleflags.io/api/flag/TEAM_ID/FLAG_KEY/ENV_KEY/GROUP_KEY";
        using HttpClient client = new HttpClient();
        HttpResponseMessage response = await client.GetAsync(url);
        string responseBody = await response.Content.ReadAsStringAsync();
        JObject json = JObject.Parse(responseBody);
        bool isEnabled = (string)json["status"] == "enabled";

        if (isEnabled)
        {
            // Do something if the feature flag is enabled
        }
    }
}

package main

import (
    "encoding/json"
    "fmt"
    "io/ioutil"
    "net/http"
)

func main() {
    url := "https://simpleflags.io/api/flag/TEAM_ID/FLAG_KEY/ENV_KEY/GROUP_KEY"
    response, err := http.Get(url)
    if err != nil {
        panic(err)
    }
    defer response.Body.Close()

    body, err := ioutil.ReadAll(response.Body)
    if err != nil {
        panic(err)
    }

    var result map[string]interface{}
    json.Unmarshal(body, &result)
    isEnabled := result["status"] == "enabled"

    if isEnabled {
        // Do something if the feature flag is enabled
    }
}