curl -X GET 'https://api.countrystatecity.in/v1/countries' \
  -H 'X-CSCAPI-KEY: YOUR_API_KEY'

curl -X GET 'https://api.countrystatecity.in/v1/countries?q=india' \
  -H 'X-CSCAPI-KEY: YOUR_API_KEY'

curl -X GET 'https://api.countrystatecity.in/v1/countries?include_translations=true' \
  -H 'X-CSCAPI-KEY: YOUR_API_KEY'

import requests

response = requests.get(
  'https://api.countrystatecity.in/v1/countries',
  headers={'X-CSCAPI-KEY': 'YOUR_API_KEY'}
)

countries = response.json()
print(countries)

const response = await fetch('https://api.countrystatecity.in/v1/countries', {
  headers: { 'X-CSCAPI-KEY': 'YOUR_API_KEY' }
});

const countries = await response.json();
console.log(countries);

<?php
$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => 'https://api.countrystatecity.in/v1/countries',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_HTTPHEADER => array(
    'X-CSCAPI-KEY: YOUR_API_KEY'
  ),
));

$response = curl_exec($curl);
curl_close($curl);

$countries = json_decode($response, true);
echo json_encode($countries, JSON_PRETTY_PRINT);
?>

package main

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

func main() {
    url := "https://api.countrystatecity.in/v1/countries"
    
    client := &http.Client{}
    req, _ := http.NewRequest("GET", url, nil)
    req.Header.Add("X-CSCAPI-KEY", "YOUR_API_KEY")
    
    res, _ := client.Do(req)
    defer res.Body.Close()
    
    body, _ := ioutil.ReadAll(res.Body)
    fmt.Println(string(body))
}

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Countries {
    public static void main(String[] args) throws Exception {
        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://api.countrystatecity.in/v1/countries"))
            .header("X-CSCAPI-KEY", "YOUR_API_KEY")
            .build();

        HttpResponse<String> response = client.send(request,
            HttpResponse.BodyHandlers.ofString());
        System.out.println(response.body());
    }
}

require 'net/http'
require 'json'

uri = URI("https://api.countrystatecity.in/v1/countries")
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Get.new(uri)
request['X-CSCAPI-KEY'] = 'YOUR_API_KEY'

response = http.request(request)
countries = JSON.parse(response.body)
puts JSON.pretty_generate(countries)

[
  {
    "id": 101,
    "name": "India",
    "iso2": "IN",
    "iso3": "IND",
    "phonecode": "91",
    "capital": "New Delhi",
    "currency": "INR",
    "native": "भारत",
    "emoji": "🇮🇳",
    "latitude": "20.00000000",
    "longitude": "77.00000000",
    "region": "Asia",
    "region_id": 3,
    "subregion": "Southern Asia",
    "subregion_id": 14,
    "timezones": "[{\"zoneName\":\"Asia/Kolkata\",\"gmtOffset\":19800,\"gmtOffsetName\":\"UTC+05:30\",\"abbreviation\":\"IST\",\"tzName\":\"Indian Standard Time\"}]"
  }
]

[
  {
    "id": 101,
    "name": "India",
    "iso2": "IN",
    "iso3": "IND",
    "phonecode": "91",
    "capital": "New Delhi",
    "currency": "INR",
    "native": "भारत",
    "emoji": "🇮🇳",
    "latitude": "20.00000000",
    "longitude": "77.00000000",
    "region": "Asia",
    "region_id": 3,
    "subregion": "Southern Asia",
    "subregion_id": 14,
    "timezones": "[{\"zoneName\":\"Asia/Kolkata\",\"gmtOffset\":19800,\"gmtOffsetName\":\"UTC+05:30\",\"abbreviation\":\"IST\",\"tzName\":\"Indian Standard Time\"}]",
    "numeric_code": "356",
    "currency_name": "Indian rupee",
    "currency_symbol": "₹",
    "tld": ".in",
    "nationality": "Indian",
    "population": 1380004385,
    "gdp": 2870504000000,
    "area_sq_km": 3287263,
    "postal_code_format": "######",
    "postal_code_regex": "^(\\d{6})$",
    "emojiU": "U+1F1EE U+1F1F3",
    "translations": "{\"kr\":\"인도\",\"de\":\"Indien\",\"es\":\"India\",\"fr\":\"Inde\",\"ja\":\"インド\"}",
    "wikiDataId": "Q668"
  }
]

{
  "error": "Unauthorized. You shouldn't be here."
}